| **Contingencies and Other Commitments (Details) - HHS-OIG Investigation [Member]** | Mar. 31, 2016 | Feb. 28, 2015 | Apr. 24, 2014 | Mar. 04, 2013 |
|------------------------------------------------------------------------------------|---------------|---------------|---------------|---------------|
| **Contingencies (Textual) [Abstract]**                                             |          |          |          |          |
| 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             |          |
| Number of additional patient medical records requested                             |          | 70            |          |          |
| 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
Contingencies.
+ References
No definition available.
+ Details**Name:**hls_ContingenciesTextualAbstract**Namespace Prefix:**hls_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| 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
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                                                                                                                                                                        |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LossContingenciesByNatureOfContingencyAxis=hls_HhsOigInvestigationMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |