| **Contingencies and Other Commitments (Details) (USD $)**                  | 3 Months Ended  | 12 Months Ended |         |        |        |
|----------------------------------------------------------------------------|-----------------|-----------------|---------|--------|--------|
||
| **Contingencies (Textual) [Abstract]**                                     |            |            |    |   |   |   |
| Litigation Settlement, Gross                                               | $ 2,900,000,000 |            |    |   |   |   |
| Long-term Purchase Commitment, Time Period                                 |            |            | 3 years |   |   |   |
| Consent Judgment Awarded to Plaintiff                                      |            | 376,000,000     |    |   |   |   |
| Loss Contingency, Litigation Settlement, Consideration                     |            | $ 300,000       |    |   |   |   |
| Number of hospitals that received subpoenas                                |            |            |    |   | 7      | 4 |
| Number of patient medical records requested for each hospital in subpoenas |            |            |    |   |   | 100 |
| Number of hospitals that received supplemental subpoenas                   |            |            |    |   | 2      |   |
| Compliance Threshold Under Health Care Act                                 |            |            |    | 60.00% |   |   |

| 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 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
Amount of judgment or settlement awarded to (against) the entity in respect of litigation.
+ References
No definition available.
+ Details**Name:**us-gaap_LitigationSettlementAmount**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| 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 |