| **Condensed Consolidating Financial Information Tables 6 - 8 (Details) (USD $)In Millions, unless otherwise specified** | 0 Months Ended                          | 3 Months Ended                                          | 12 Months Ended                                                                                                            |                                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------|-----------------------------------------|---------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------|
||
| **Consolidated Statements of Cash Flows [Abstract]**                                                                    |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Net cash provided by operating activities                                                                               |                                    |                                                    | $ 444.9us-gaap_NetCashProvidedByUsedInOperatingActivities                                                                  | $ 470.3us-gaap_NetCashProvidedByUsedInOperatingActivities                                                                             | $ 411.5us-gaap_NetCashProvidedByUsedInOperatingActivities |   |
| **Cash flows from investing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Acquisition of businesses, net of cash acquired                                                                         |                                    |                                                    | (694.8)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired                                                                | (28.9)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired                                                                            | (3.1)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |   |
| Purchases of property and equipment                                                                                     |                                    |                                                    | (170.9)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment                                                                  | (195.2)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment                                                                             | (140.8)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |   |
| Capitalized software costs                                                                                              |                                    |                                                    | (17.0)us-gaap_PaymentsForSoftware                                                                                          | (21.3)us-gaap_PaymentsForSoftware                                                                                                     | (18.9)us-gaap_PaymentsForSoftware |   |
| Proceeds from sale of restricted investments                                                                            |                                    |                                                    | 0.3us-gaap_ProceedsFromSaleOfRestrictedInvestments                                                                         | 16.9us-gaap_ProceedsFromSaleOfRestrictedInvestments                                                                                   | 0.3us-gaap_ProceedsFromSaleOfRestrictedInvestments |   |
| Proceeds from sale of Digital Hospital                                                                                  |                                    | 10.8us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment                                                                       | 10.8us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment                                                                               | 0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment |   |
| Purchase of restricted investments                                                                                      |                                    |                                                    | (3.5)us-gaap_PaymentsToAcquireRestrictedInvestments                                                                        | (9.2)us-gaap_PaymentsToAcquireRestrictedInvestments                                                                                   | (9.1)us-gaap_PaymentsToAcquireRestrictedInvestments |   |
| Net change in restricted cash                                                                                           |                                    |                                                    | 6.8us-gaap_IncreaseDecreaseInRestrictedCash                                                                                | (3.1)us-gaap_IncreaseDecreaseInRestrictedCash                                                                                         | (14.0)us-gaap_IncreaseDecreaseInRestrictedCash |   |
| Other                                                                                                                   |                                    |                                                    | 2.2us-gaap_PaymentsForProceedsFromOtherInvestingActivities                                                                 | 0.5us-gaap_PaymentsForProceedsFromOtherInvestingActivities                                                                            | (0.9)us-gaap_PaymentsForProceedsFromOtherInvestingActivities |   |
| Net cash provided by investing activities of discontinued operations                                                    |                                    |                                                    | 0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations                                                     | 3.3us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations                                                              | 7.7us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations |   |
| Net cash used in investing activities                                                                                   |                                    |                                                    | (876.9)us-gaap_NetCashProvidedByUsedInInvestingActivities                                                                  | (226.2)us-gaap_NetCashProvidedByUsedInInvestingActivities                                                                             | (178.8)us-gaap_NetCashProvidedByUsedInInvestingActivities |   |
| **Cash flows from financing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Principal borrowings on term loan facilities                                                                            |                                    |                                                    | 450.0us-gaap_ProceedsFromIssuanceOfSecuredDebt                                                                             | 0us-gaap_ProceedsFromIssuanceOfSecuredDebt                                                                                            | 0us-gaap_ProceedsFromIssuanceOfSecuredDebt |   |
| Proceeds from bond issuance                                                                                             |                                    |                                                    | 175.0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt                                                                      | 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt                                                                                     | 275.0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt |   |
| Principal payments on debt, including pre-payments                                                                      |                                    |                                                    | (302.6)us-gaap_RepaymentsOfLongTermDebt                                                                                    | (62.5)us-gaap_RepaymentsOfLongTermDebt                                                                                                | (166.2)us-gaap_RepaymentsOfLongTermDebt |   |
| Principal borrowings on notes                                                                                           |                                    |                                                    | 0us-gaap_ProceedsFromNotesPayable                                                                                          | 15.2us-gaap_ProceedsFromNotesPayable                                                                                                  | 0us-gaap_ProceedsFromNotesPayable |   |
| Borrowings on revolving credit facility                                                                                 |                                    |                                                    | 440.0us-gaap_ProceedsFromLongTermLinesOfCredit                                                                             | 197.0us-gaap_ProceedsFromLongTermLinesOfCredit                                                                                        | 135.0us-gaap_ProceedsFromLongTermLinesOfCredit |   |
| Payments on revolving credit facility                                                                                   |                                    |                                                    | (160.0)us-gaap_RepaymentsOfLongTermLinesOfCredit                                                                           | (152.0)us-gaap_RepaymentsOfLongTermLinesOfCredit                                                                                      | (245.0)us-gaap_RepaymentsOfLongTermLinesOfCredit |   |
| Principal payments under capital lease obligations                                                                      |                                    |                                                    | (6.1)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations                                                                   | (10.1)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations                                                                             | (12.1)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations |   |
| Repurchase of common stock, including fees and expenses                                                                 |                                    |                                                    | (43.1)us-gaap_PaymentsForRepurchaseOfCommonStock                                                                           | (234.1)us-gaap_PaymentsForRepurchaseOfCommonStock                                                                                     | 0us-gaap_PaymentsForRepurchaseOfCommonStock |   |
| Repurchases of convertible perpetual preferred stock, including fees                                                    |                                    |                                                    | 0us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock                                                           | (2.8)us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock                                                                  | (46.0)us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock |   |
| Dividends paid on common stock                                                                                          |                                    |                                                    | (65.8)us-gaap_PaymentsOfDividendsCommonStock                                                                               | (15.7)us-gaap_PaymentsOfDividendsCommonStock                                                                                          | 0us-gaap_PaymentsOfDividendsCommonStock |   |
| Dividends paid on convertible perpetual preferred stock                                                                 |                                    |                                                    | (6.3)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock                                                           | (23.0)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock                                                                     | (24.6)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock |   |
| Distributions paid to noncontrolling interests of consolidated affiliates                                               |                                    |                                                    | (54.1)us-gaap_PaymentsOfDividendsMinorityInterest                                                                          | (46.3)us-gaap_PaymentsOfDividendsMinorityInterest                                                                                     | (49.3)us-gaap_PaymentsOfDividendsMinorityInterest |   |
| Contributions from consolidated affiliates                                                                              |                                    |                                                    | 0us-gaap_ProceedsFromContributionsFromAffiliates                                                                           | 1.6us-gaap_ProceedsFromContributionsFromAffiliates                                                                                    | 10.5us-gaap_ProceedsFromContributionsFromAffiliates |   |
| Proceeds from exercising stock warrants                                                                                 | 6.3us-gaap_ProceedsFromWarrantExercises |                                                    | 6.3us-gaap_ProceedsFromWarrantExercises                                                                                    | 15.3us-gaap_ProceedsFromWarrantExercises                                                                                              | 0us-gaap_ProceedsFromWarrantExercises |   |
| Other                                                                                                                   |                                    |                                                    | 0.9us-gaap_ProceedsFromPaymentsForOtherFinancingActivities                                                                 | 5.0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities                                                                            | (7.3)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities |   |
| Change in intercompany advances                                                                                         |                                    |                                                    | 0us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt                                                                          | 0us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt                                                                                     | 0us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt |   |
| Net cash provided by (used in) financing activities                                                                     |                                    |                                                    | 434.2us-gaap_NetCashProvidedByUsedInFinancingActivities                                                                    | (312.4)us-gaap_NetCashProvidedByUsedInFinancingActivities                                                                             | (130.0)us-gaap_NetCashProvidedByUsedInFinancingActivities |   |
| Increase (decrease) in cash and cash equivalents                                                                        |                                    |                                                    | 2.2us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease                                                                    | (68.3)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease                                                                            | 102.7us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease |   |
| Cash and cash equivalents at end of year                                                                                |                                    |                                                    | 66.7us-gaap_CashAndCashEquivalentsAtCarryingValue                                                                          | 64.5us-gaap_CashAndCashEquivalentsAtCarryingValue                                                                                     | 132.8us-gaap_CashAndCashEquivalentsAtCarryingValue | 30.1us-gaap_CashAndCashEquivalentsAtCarryingValue |
| **Supplemental schedule of noncash financing activities: [Abstract]**                                                   |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Convertible debt issued                                                                                                 |                                    |                                                    | 0hls_Convertibledebtissued                                                                                                 | 320.0hls_Convertibledebtissued                                                                                                        | 0hls_Convertibledebtissued |   |
| Repurchase of preferred stock                                                                                           |                                    |                                                    | 0hls_Repurchaseofpreferredstock                                                                                            | (320.0)hls_Repurchaseofpreferredstock                                                                                                 | 0hls_Repurchaseofpreferredstock |   |
| Equity rollover from Encompass management                                                                               |                                    |                                                    | 64.5hls_Equityrolloverfromabusinesscombination                                                                             | 0hls_Equityrolloverfromabusinesscombination                                                                                           | 0hls_Equityrolloverfromabusinesscombination |   |
| **Condensed Consolidating Financial Information (Textual) (Abstract)**                                                  |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| HealthSouth ownership percentage of subsidiary guarantors                                                               |                                    |                                                    | 100.00%hls_OwnershipPercentageOfSubsidiaryGuarantors                                                                       |                                                                                                                                  |   |   |
| Senior secured leverage ratio maximum                                                                                   |                                    |                                                    | 1.75hls_Seniorsecuredleverageratiomaximum                                                                                  |                                                                                                                                  |   |   |
| Consolidated coverage ratio minimum                                                                                     |                                    |                                                    | 2hls_Consolidatedcoverageratiominimum                                                                                      |                                                                                                                                  |   |   |
| HealthSouth Corporation                                                                                                 |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| **Consolidated Statements of Cash Flows [Abstract]**                                                                    |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Net cash provided by operating activities                                                                               |                                    |                                                    | 21.9us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                   | 113.2us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                             | 31.3us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| **Cash flows from investing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Acquisition of businesses, net of cash acquired                                                                         |                                    |                                                    | (674.6)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember              | 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                               | 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Purchases of property and equipment                                                                                     |                                    |                                                    | (15.6)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                 | (2.8)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                             | (4.8)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Capitalized software costs                                                                                              |                                    |                                                    | (8.6)us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                         | (6.0)us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                                    | (8.5)us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Proceeds from sale of restricted investments                                                                            |                                    |                                                    | 0us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                         | 0us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                    | 0us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Proceeds from sale of Digital Hospital                                                                                  |                                    |                                                    |                                                                                                                       | 10.8us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                             |   |   |
| Purchase of restricted investments                                                                                      |                                    |                                                    | 0us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                          | 0us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                     | 0us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Net change in restricted cash                                                                                           |                                    |                                                    | 1.0us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                              | (0.2)us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                       | (0.1)us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Other                                                                                                                   |                                    |                                                    | 0us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                 | 0us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                            | (0.3)us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Net cash provided by investing activities of discontinued operations                                                    |                                    |                                                    |                                                                                                                       | 0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember              | 4.4us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Net cash used in investing activities                                                                                   |                                    |                                                    | (697.8)us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                | 1.8us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                               | (9.3)us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| **Cash flows from financing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Principal borrowings on term loan facilities                                                                            |                                    |                                                    | 450.0us-gaap_ProceedsFromIssuanceOfSecuredDebt/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                           |                                                                                                                                  |   |   |
| Proceeds from bond issuance                                                                                             |                                    |                                                    | 175.0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                    |                                                                                                                                  | 275.0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Principal payments on debt, including pre-payments                                                                      |                                    |                                                    | (298.0)us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                  | (59.5)us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                              | (164.9)us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Principal borrowings on notes                                                                                           |                                    |                                                    |                                                                                                                       | 0us-gaap_ProceedsFromNotesPayable/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                                   |   |   |
| Borrowings on revolving credit facility                                                                                 |                                    |                                                    | 440.0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                           | 197.0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                      | 135.0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Payments on revolving credit facility                                                                                   |                                    |                                                    | (160.0)us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                         | (152.0)us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                    | (245.0)us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Principal payments under capital lease obligations                                                                      |                                    |                                                    | (0.3)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                 | (0.3)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                            | (0.3)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Repurchase of common stock, including fees and expenses                                                                 |                                    |                                                    | (43.1)us-gaap_PaymentsForRepurchaseOfCommonStock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                         | (234.1)us-gaap_PaymentsForRepurchaseOfCommonStock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                   |   |   |
| Repurchases of convertible perpetual preferred stock, including fees                                                    |                                    |                                                    |                                                                                                                       | (2.8)us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                | (46.0)us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Dividends paid on common stock                                                                                          |                                    |                                                    | (65.8)us-gaap_PaymentsOfDividendsCommonStock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                             | (15.7)us-gaap_PaymentsOfDividendsCommonStock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                        |   |   |
| Dividends paid on convertible perpetual preferred stock                                                                 |                                    |                                                    | (6.3)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember         | (23.0)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                   | (24.6)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Distributions paid to noncontrolling interests of consolidated affiliates                                               |                                    |                                                    | 0us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                             | 0us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                        | 0us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Contributions from consolidated affiliates                                                                              |                                    |                                                    |                                                                                                                       | 0us-gaap_ProceedsFromContributionsFromAffiliates/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                    | 0us-gaap_ProceedsFromContributionsFromAffiliates/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Proceeds from exercising stock warrants                                                                                 |                                    |                                                    | 6.3us-gaap_ProceedsFromWarrantExercises/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                  | 15.3us-gaap_ProceedsFromWarrantExercises/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                            |   |   |
| Other                                                                                                                   |                                    |                                                    | 0.9us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember               | 5.0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                          | 0.2us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Change in intercompany advances                                                                                         |                                    |                                                    | 158.6us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                    | 84.3us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                | 153.9us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Net cash provided by (used in) financing activities                                                                     |                                    |                                                    | 657.3us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                  | (185.8)us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                           | 83.3us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Increase (decrease) in cash and cash equivalents                                                                        |                                    |                                                    | (18.6)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember               | (70.8)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                          | 105.3us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |   |
| Cash and cash equivalents at end of year                                                                                |                                    |                                                    | 41.9us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                        | 60.5us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                   | 131.3us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember | 26.0us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember |
| **Supplemental schedule of noncash financing activities: [Abstract]**                                                   |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Convertible debt issued                                                                                                 |                                    |                                                    |                                                                                                                       | 320.0hls_Convertibledebtissued/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                                      |   |   |
| Repurchase of preferred stock                                                                                           |                                    |                                                    |                                                                                                                       | (320.0)hls_Repurchaseofpreferredstock/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                                               |   |   |
| Equity rollover from Encompass management                                                                               |                                    |                                                    | 0hls_Equityrolloverfromabusinesscombination/ dei_LegalEntityAxis= us-gaap_ParentCompanyMember                              |                                                                                                                                  |   |   |
| Guarantor Subsidiaries                                                                                                  |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| **Consolidated Statements of Cash Flows [Abstract]**                                                                    |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Net cash provided by operating activities                                                                               |                                    |                                                    | 260.1us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember          | 235.7us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                     | 252.4us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| **Cash flows from investing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Acquisition of businesses, net of cash acquired                                                                         |                                    |                                                    | 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember            | (28.9)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                  | (3.1)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Purchases of property and equipment                                                                                     |                                    |                                                    | (124.0)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember        | (167.9)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                   | (98.4)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Capitalized software costs                                                                                              |                                    |                                                    | (1.4)us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                 | (11.1)us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                           | (7.2)us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Proceeds from sale of restricted investments                                                                            |                                    |                                                    | 0us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                 | 0us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                            | 0us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Proceeds from sale of Digital Hospital                                                                                  |                                    |                                                    |                                                                                                                       | 0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                        |   |   |
| Purchase of restricted investments                                                                                      |                                    |                                                    | 0us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                  | 0us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                             | 0us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Net change in restricted cash                                                                                           |                                    |                                                    | 0us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                        | 0us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                   | 0us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Other                                                                                                                   |                                    |                                                    | (0.7)us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember     | 0.9us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                  | (0.8)us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Net cash provided by investing activities of discontinued operations                                                    |                                    |                                                    |                                                                                                                       | 3.1us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember    | 3.3us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Net cash used in investing activities                                                                                   |                                    |                                                    | (126.1)us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember        | (203.9)us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                   | (106.2)us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| **Cash flows from financing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Principal borrowings on term loan facilities                                                                            |                                    |                                                    | 0us-gaap_ProceedsFromIssuanceOfSecuredDebt/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                       |                                                                                                                                  |   |   |
| Proceeds from bond issuance                                                                                             |                                    |                                                    | 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                |                                                                                                                                  | 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Principal payments on debt, including pre-payments                                                                      |                                    |                                                    | (1.5)us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                            | (1.3)us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                       | (1.3)us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Principal borrowings on notes                                                                                           |                                    |                                                    |                                                                                                                       | 0us-gaap_ProceedsFromNotesPayable/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                           |   |   |
| Borrowings on revolving credit facility                                                                                 |                                    |                                                    | 0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                       | 0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                  | 0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Payments on revolving credit facility                                                                                   |                                    |                                                    | 0us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                       | 0us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                  | 0us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Principal payments under capital lease obligations                                                                      |                                    |                                                    | (2.5)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember         | (6.3)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                    | (8.9)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Repurchase of common stock, including fees and expenses                                                                 |                                    |                                                    | 0us-gaap_PaymentsForRepurchaseOfCommonStock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                      | 0us-gaap_PaymentsForRepurchaseOfCommonStock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                 |   |   |
| Repurchases of convertible perpetual preferred stock, including fees                                                    |                                    |                                                    |                                                                                                                       | 0us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember            | 0us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Dividends paid on common stock                                                                                          |                                    |                                                    | 0us-gaap_PaymentsOfDividendsCommonStock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                          | 0us-gaap_PaymentsOfDividendsCommonStock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                     |   |   |
| Dividends paid on convertible perpetual preferred stock                                                                 |                                    |                                                    | 0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember     | 0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                | 0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Distributions paid to noncontrolling interests of consolidated affiliates                                               |                                    |                                                    | 0us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                     | 0us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                | 0us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Contributions from consolidated affiliates                                                                              |                                    |                                                    |                                                                                                                       | 0us-gaap_ProceedsFromContributionsFromAffiliates/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                            | 0us-gaap_ProceedsFromContributionsFromAffiliates/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Proceeds from exercising stock warrants                                                                                 |                                    |                                                    | 0us-gaap_ProceedsFromWarrantExercises/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                            | 0us-gaap_ProceedsFromWarrantExercises/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                       |   |   |
| Other                                                                                                                   |                                    |                                                    | 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember         | 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                    | 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Change in intercompany advances                                                                                         |                                    |                                                    | (130.8)us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember          | (22.2)us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                      | (137.0)us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Net cash provided by (used in) financing activities                                                                     |                                    |                                                    | (134.8)us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember        | (29.8)us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                    | (147.2)us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Increase (decrease) in cash and cash equivalents                                                                        |                                    |                                                    | (0.8)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember        | 2.0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                     | (1.0)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |   |
| Cash and cash equivalents at end of year                                                                                |                                    |                                                    | 1.5us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                 | 2.3us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                            | 0.3us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember | 1.3us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember |
| **Supplemental schedule of noncash financing activities: [Abstract]**                                                   |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Convertible debt issued                                                                                                 |                                    |                                                    |                                                                                                                       | 0hls_Convertibledebtissued/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                                  |   |   |
| Repurchase of preferred stock                                                                                           |                                    |                                                    |                                                                                                                       | 0hls_Repurchaseofpreferredstock/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                                             |   |   |
| Equity rollover from Encompass management                                                                               |                                    |                                                    | 0hls_Equityrolloverfromabusinesscombination/ dei_LegalEntityAxis= us-gaap_GuarantorSubsidiariesMember                      |                                                                                                                                  |   |   |
| Non-Guarantor Subsidiaries                                                                                              |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| **Consolidated Statements of Cash Flows [Abstract]**                                                                    |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Net cash provided by operating activities                                                                               |                                    |                                                    | 162.9us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember       | 121.4us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                  | 127.8us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| **Cash flows from investing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Acquisition of businesses, net of cash acquired                                                                         |                                    |                                                    | (20.2)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember    | 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                    | 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Purchases of property and equipment                                                                                     |                                    |                                                    | (31.3)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember      | (24.5)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                 | (37.6)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Capitalized software costs                                                                                              |                                    |                                                    | (7.0)us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                              | (4.2)us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                                         | (3.2)us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Proceeds from sale of restricted investments                                                                            |                                    |                                                    | 0.3us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember            | 16.9us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                      | 0.3us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Proceeds from sale of Digital Hospital                                                                                  |                                    |                                                    |                                                                                                                       | 0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                     |   |   |
| Purchase of restricted investments                                                                                      |                                    |                                                    | (3.5)us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember           | (9.2)us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                      | (9.1)us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Net change in restricted cash                                                                                           |                                    |                                                    | 5.8us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                   | (2.9)us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                            | (13.9)us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Other                                                                                                                   |                                    |                                                    | 2.9us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember    | (0.4)us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember             | 0.2us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Net cash provided by investing activities of discontinued operations                                                    |                                    |                                                    |                                                                                                                       | 0.2us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember | 0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Net cash used in investing activities                                                                                   |                                    |                                                    | (53.0)us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember      | (24.1)us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                 | (63.3)us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| **Cash flows from financing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Principal borrowings on term loan facilities                                                                            |                                    |                                                    | 0us-gaap_ProceedsFromIssuanceOfSecuredDebt/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                    |                                                                                                                                  |   |   |
| Proceeds from bond issuance                                                                                             |                                    |                                                    | 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember             |                                                                                                                                  | 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Principal payments on debt, including pre-payments                                                                      |                                    |                                                    | (3.1)us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                         | (1.7)us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                                    | 0us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Principal borrowings on notes                                                                                           |                                    |                                                    |                                                                                                                       | 15.2us-gaap_ProceedsFromNotesPayable/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                                     |   |   |
| Borrowings on revolving credit facility                                                                                 |                                    |                                                    | 0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                    | 0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                               | 0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Payments on revolving credit facility                                                                                   |                                    |                                                    | 0us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                    | 0us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                               | 0us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Principal payments under capital lease obligations                                                                      |                                    |                                                    | (3.3)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember      | (3.5)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                 | (2.9)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Repurchase of common stock, including fees and expenses                                                                 |                                    |                                                    | 0us-gaap_PaymentsForRepurchaseOfCommonStock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                   | 0us-gaap_PaymentsForRepurchaseOfCommonStock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                              |   |   |
| Repurchases of convertible perpetual preferred stock, including fees                                                    |                                    |                                                    |                                                                                                                       | 0us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember         | 0us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Dividends paid on common stock                                                                                          |                                    |                                                    | 0us-gaap_PaymentsOfDividendsCommonStock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                       | 0us-gaap_PaymentsOfDividendsCommonStock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                                  |   |   |
| Dividends paid on convertible perpetual preferred stock                                                                 |                                    |                                                    | 0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember  | 0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember             | 0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Distributions paid to noncontrolling interests of consolidated affiliates                                               |                                    |                                                    | (54.1)us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember             | (46.3)us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                        | (49.3)us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Contributions from consolidated affiliates                                                                              |                                    |                                                    |                                                                                                                       | 1.6us-gaap_ProceedsFromContributionsFromAffiliates/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                       | 10.5us-gaap_ProceedsFromContributionsFromAffiliates/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Proceeds from exercising stock warrants                                                                                 |                                    |                                                    | 0us-gaap_ProceedsFromWarrantExercises/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                         | 0us-gaap_ProceedsFromWarrantExercises/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                                    |   |   |
| Other                                                                                                                   |                                    |                                                    | 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember      | 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                 | (7.5)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Change in intercompany advances                                                                                         |                                    |                                                    | (27.8)us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember        | (62.1)us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                   | (16.9)us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Net cash provided by (used in) financing activities                                                                     |                                    |                                                    | (88.3)us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember      | (96.8)us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                 | (66.1)us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Increase (decrease) in cash and cash equivalents                                                                        |                                    |                                                    | 21.6us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember      | 0.5us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                  | (1.6)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |   |
| Cash and cash equivalents at end of year                                                                                |                                    |                                                    | 23.3us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember             | 1.7us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                         | 1.2us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember | 2.8us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember |
| **Supplemental schedule of noncash financing activities: [Abstract]**                                                   |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Convertible debt issued                                                                                                 |                                    |                                                    |                                                                                                                       | 0hls_Convertibledebtissued/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                                               |   |   |
| Repurchase of preferred stock                                                                                           |                                    |                                                    |                                                                                                                       | 0hls_Repurchaseofpreferredstock/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                                          |   |   |
| Equity rollover from Encompass management                                                                               |                                    |                                                    | 64.5hls_Equityrolloverfromabusinesscombination/ dei_LegalEntityAxis= us-gaap_NonGuarantorSubsidiariesMember                |                                                                                                                                  |   |   |
| Eliminating Entries                                                                                                     |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| **Consolidated Statements of Cash Flows [Abstract]**                                                                    |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Net cash provided by operating activities                                                                               |                                    |                                                    | 0us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember          | 0us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                     | 0us-gaap_NetCashProvidedByUsedInOperatingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| **Cash flows from investing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Acquisition of businesses, net of cash acquired                                                                         |                                    |                                                    | 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember        | 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                   | 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Purchases of property and equipment                                                                                     |                                    |                                                    | 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember          | 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                     | 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Capitalized software costs                                                                                              |                                    |                                                    | 0us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                                 | 0us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                                            | 0us-gaap_PaymentsForSoftware/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Proceeds from sale of restricted investments                                                                            |                                    |                                                    | 0us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember             | 0us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                        | 0us-gaap_ProceedsFromSaleOfRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Proceeds from sale of Digital Hospital                                                                                  |                                    |                                                    |                                                                                                                       | 0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                    |   |   |
| Purchase of restricted investments                                                                                      |                                    |                                                    | 0us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember              | 0us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                         | 0us-gaap_PaymentsToAcquireRestrictedInvestments/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Net change in restricted cash                                                                                           |                                    |                                                    | 0us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                    | 0us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                               | 0us-gaap_IncreaseDecreaseInRestrictedCash/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Other                                                                                                                   |                                    |                                                    | 0us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember     | 0us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                | 0us-gaap_PaymentsForProceedsFromOtherInvestingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Net cash provided by investing activities of discontinued operations                                                    |                                    |                                                    |                                                                                                                       | 0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember  | 0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Net cash used in investing activities                                                                                   |                                    |                                                    | 0us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember          | 0us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                     | 0us-gaap_NetCashProvidedByUsedInInvestingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| **Cash flows from financing activities:**                                                                               |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Principal borrowings on term loan facilities                                                                            |                                    |                                                    | 0us-gaap_ProceedsFromIssuanceOfSecuredDebt/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                   |                                                                                                                                  |   |   |
| Proceeds from bond issuance                                                                                             |                                    |                                                    | 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember            |                                                                                                                                  | 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Principal payments on debt, including pre-payments                                                                      |                                    |                                                    | 0us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                            | 0us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                                       | 0us-gaap_RepaymentsOfLongTermDebt/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Principal borrowings on notes                                                                                           |                                    |                                                    |                                                                                                                       | 0us-gaap_ProceedsFromNotesPayable/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                                       |   |   |
| Borrowings on revolving credit facility                                                                                 |                                    |                                                    | 0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                   | 0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                              | 0us-gaap_ProceedsFromLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Payments on revolving credit facility                                                                                   |                                    |                                                    | 0us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                   | 0us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                              | 0us-gaap_RepaymentsOfLongTermLinesOfCredit/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Principal payments under capital lease obligations                                                                      |                                    |                                                    | 0us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember         | 0us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                    | 0us-gaap_RepaymentsOfLongTermCapitalLeaseObligations/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Repurchase of common stock, including fees and expenses                                                                 |                                    |                                                    | 0us-gaap_PaymentsForRepurchaseOfCommonStock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                  | 0us-gaap_PaymentsForRepurchaseOfCommonStock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                             |   |   |
| Repurchases of convertible perpetual preferred stock, including fees                                                    |                                    |                                                    |                                                                                                                       | 0us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember        | 0us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Dividends paid on common stock                                                                                          |                                    |                                                    | 0us-gaap_PaymentsOfDividendsCommonStock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                      | 0us-gaap_PaymentsOfDividendsCommonStock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                                 |   |   |
| Dividends paid on convertible perpetual preferred stock                                                                 |                                    |                                                    | 0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember | 0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember            | 0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Distributions paid to noncontrolling interests of consolidated affiliates                                               |                                    |                                                    | 0us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                 | 0us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                            | 0us-gaap_PaymentsOfDividendsMinorityInterest/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Contributions from consolidated affiliates                                                                              |                                    |                                                    |                                                                                                                       | 0us-gaap_ProceedsFromContributionsFromAffiliates/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                        | 0us-gaap_ProceedsFromContributionsFromAffiliates/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Proceeds from exercising stock warrants                                                                                 |                                    |                                                    | 0us-gaap_ProceedsFromWarrantExercises/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                        | 0us-gaap_ProceedsFromWarrantExercises/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                                   |   |   |
| Other                                                                                                                   |                                    |                                                    | 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember     | 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                | 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Change in intercompany advances                                                                                         |                                    |                                                    | 0us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember            | 0us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                       | 0us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Net cash provided by (used in) financing activities                                                                     |                                    |                                                    | 0us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember          | 0us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                     | 0us-gaap_NetCashProvidedByUsedInFinancingActivities/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Increase (decrease) in cash and cash equivalents                                                                        |                                    |                                                    | 0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember        | 0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                   | 0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |   |
| Cash and cash equivalents at end of year                                                                                |                                    |                                                    | 0us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember               | 0us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                          | 0us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember |
| **Supplemental schedule of noncash financing activities: [Abstract]**                                                   |                                    |                                                    |                                                                                                                       |                                                                                                                                  |   |   |
| Convertible debt issued                                                                                                 |                                    |                                                    |                                                                                                                       | 0hls_Convertibledebtissued/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                                              |   |   |
| Repurchase of preferred stock                                                                                           |                                    |                                                    |                                                                                                                       | 0hls_Repurchaseofpreferredstock/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                                         |   |   |
| Equity rollover from Encompass management                                                                               |                                    |                                                    | $ 0hls_Equityrolloverfromabusinesscombination/ dei_LegalEntityAxis= us-gaap_ConsolidationEliminationsMember                |                                                                                                                                  |   |   |

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Minimum consolidated coverage ratio to permit the declaration and payment of dividends under senior note indenture.
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Convertible debt issued to repurchase preferred stock.
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The equity rollover from a business combination.
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No definition available.
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| - Definition
HealthSouth's ownership percentage in its guarantor subsidiaries.
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| - Definition
Preferred stock repurchased through issuance of convertible debt.
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No definition available.
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| - Definition
Max senior secured leverage ratio to permit unlimited restricted payments under credit agreement.
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No definition available.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.
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| - Definition
Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.
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| - Definition
Amount of cash inflow (outflow) of investing activities of discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.
+ References
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| - Definition
The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.
+ References
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| - Definition
Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.
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| - Definition
Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow to reacquire common stock during the period.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow to reacquire preferred stock during the period.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow associated with the development, modification or acquisition of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow to acquire investments (not to include restricted cash) that are pledged or subject to withdrawal restrictions.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral. Excludes proceeds from tax exempt secured debt.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow from a borrowing supported by a written promise to pay an obligation.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash inflow (outflow) from long-term debt by a related party. Related parties, include, but are not limited to, affiliates, owners or officers and their immediate families, and pension trusts.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow associated with the sale of investments that are pledged or subject to withdrawal restrictions during the period.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow associated with the amount received from holders exercising their stock warrants.
+ References
No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.
+ References
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