| **Contingencies and Other Commitments (Details) (USD $)**                  | 12 Months Ended                                                                                                                                        |         |                                                                                                                                    |                                                                                                                                           |                                                                                                                                            |
|----------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------|---------|------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------|
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| Litigation, General Medicine [Member]                                      |                                                                                                                                                   |    |                                                                                                                               |                                                                                                                                      |                                                                                                                                       |   |
| **Contingencies (Textual) [Abstract]**                                     |                                                                                                                                                   |    |                                                                                                                               |                                                                                                                                      |                                                                                                                                       |   |
| Long-term Purchase Commitment, Time Period                                 |                                                                                                                                                   | 3 years |                                                                                                                               |                                                                                                                                      |                                                                                                                                       |   |
| Consent Judgment Awarded to Plaintiff                                      | $ 376,000,000hls_ConsentJudgmentAwardedToPlaintiff/ us-gaap_LossContingenciesByNatureOfContingencyAxis= hls_LitigationGeneralMedicineMember            |    |                                                                                                                               |                                                                                                                                      |                                                                                                                                       |   |
| Loss Contingency, Litigation Settlement, Consideration                     | $ 300,000hls_LossContingencyLitigationSettlementConsideration/ us-gaap_LossContingenciesByNatureOfContingencyAxis= hls_LitigationGeneralMedicineMember |    |                                                                                                                               |                                                                                                                                      |                                                                                                                                       |   |
| HHS-OIG Investigation [Member]                                             |                                                                                                                                                   |    |                                                                                                                               |                                                                                                                                      |                                                                                                                                       |   |
| **Contingencies (Textual) [Abstract]**                                     |                                                                                                                                                   |    |                                                                                                                               |                                                                                                                                      |                                                                                                                                       |   |
| Number of hospitals that received subpoenas                                |                                                                                                                                                   |    |                                                                                                                               |                                                                                                                                      | 7hls_Numberofhospitalsthatreceivedsubpoenas/ us-gaap_LossContingenciesByNatureOfContingencyAxis= hls_HhsOigInvestigationMember             | 4hls_Numberofhospitalsthatreceivedsubpoenas/ us-gaap_LossContingenciesByNatureOfContingencyAxis= hls_HhsOigInvestigationMember |
| Number of patient medical records requested for each hospital in subpoenas |                                                                                                                                                   |    |                                                                                                                               |                                                                                                                                      |                                                                                                                                       | 100hls_NumberOfPatientMedicalRecordsRequestedForEachHospitalInSubpoenas/ us-gaap_LossContingenciesByNatureOfContingencyAxis= hls_HhsOigInvestigationMember |
| Number of hospitals that received supplemental subpoenas                   |                                                                                                                                                   |    |                                                                                                                               |                                                                                                                                      | 2hls_Numberofhospitalsthatreceivedsupplementalsubpoenas/ us-gaap_LossContingenciesByNatureOfContingencyAxis= hls_HhsOigInvestigationMember |   |
| Number of additional patient medical records requested                     |                                                                                                                                                   |    |                                                                                                                               | 70hls_Numberofadditionalpatientmedicalrecordsrequested/ us-gaap_LossContingenciesByNatureOfContingencyAxis= hls_HhsOigInvestigationMember |                                                                                                                                       |   |
| Compliance Threshold Under Health Care Act                                 |                                                                                                                                                   |    | 60.00%hls_ComplianceThresholdUnderHealthCareAct/ us-gaap_LossContingenciesByNatureOfContingencyAxis= hls_HhsOigInvestigationMember |                                                                                                                                      |                                                                                                                                       |   |

| X                                                                                                                                                                                                                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Compliance threshold under the Medicare, Medicaid, and State Children's Health Insurance Program (SCHIP) Extension Act of 2007 as of the blance sheet date.
+ References
No definition available.
+ Details**Name:**hls_ComplianceThresholdUnderHealthCareAct**Namespace Prefix:**hls_**Data Type:**num:percentItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Consent judgment awarded to General Medicine against Horizon/CMS for the alleged wrongful termination of a contract to provide medical director services to skilled nursing facilities.
+ References
No definition available.
+ Details**Name:**hls_ConsentJudgmentAwardedToPlaintiff**Namespace Prefix:**hls_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**hls_ContingenciesTextualAbstract**Namespace Prefix:**hls_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of consideration to which the entity agreed to pay in a settlement agreement which resolved the matter.
+ References
No definition available.
+ Details**Name:**hls_LossContingencyLitigationSettlementConsideration**Namespace Prefix:**hls_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of additional patient medical records requested.
+ References
No definition available.
+ Details**Name:**hls_Numberofadditionalpatientmedicalrecordsrequested**Namespace Prefix:**hls_**Data Type:**xbrli:integerItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of hospitals that received subpoenas in connection with an investigation of alleged improper or fraudulent claims submitted to Medicare and Medicaid.
+ References
No definition available.
+ Details**Name:**hls_Numberofhospitalsthatreceivedsubpoenas**Namespace Prefix:**hls_**Data Type:**xbrli:integerItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                             |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of hospitals that received supplemental subpoenas to cover the new time period of January 2008 through December 2013
+ References
No definition available.
+ Details**Name:**hls_Numberofhospitalsthatreceivedsupplementalsubpoenas**Namespace Prefix:**hls_**Data Type:**xbrli:integerItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of patient medical records requested for each hospital in subpoenas.
+ References
No definition available.
+ Details**Name:**hls_NumberOfPatientMedicalRecordsRequestedForEachHospitalInSubpoenas**Namespace Prefix:**hls_**Data Type:**xbrli:integerItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                            |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
No definition available.
+ Details**Name:**us-gaap_LongtermPurchaseCommitmentPeriod**Namespace Prefix:**us-gaap_**Data Type:**xbrli:durationItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                        |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LossContingenciesByNatureOfContingencyAxis=hls_HhsOigInvestigationMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LossContingenciesByNatureOfContingencyAxis=hls_LitigationGeneralMedicineMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |