| **Business Combinations - Pro Forma Results of Operation (Details) - USD ($) $ in Millions**             | 4 Months Ended | 8 Months Ended | 10 Months Ended | 11 Months Ended | 12 Months Ended |
|----------------------------------------------------------------------------------------------------------|----------------|----------------|-----------------|-----------------|-----------------|
||
| 2018 Acquisitions [Member]                                                                               |           |           |            |            |            |   |   |   |
| **Business Acquisition [Line Items]**                                                                    |           |           |            |            |            |   |   |   |
| Business Acquisition, Pro Forma Revenue                                                                  |           |           |            |            | $ 4,337.4       | $ 4,039.9 |   |   |
| Business Acquisition, Pro Forma Net Income (Loss)                                                        |           |           |            |            | 300.0           | 289.0 |   |   |
| 2017 Acquisitions [Member]                                                                               |           |           |            |            |            |   |   |   |
| **Business Acquisition [Line Items]**                                                                    |           |           |            |            |            |   |   |   |
| Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual          |           |           |            | $ 32.9          |            |   |   |   |
| Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |           |           |            | $ (6.3)         |            |   |   |   |
| Business Acquisition, Pro Forma Revenue                                                                  |           |           |            |            |            | 3,996.1 | $ 3,771.5 |   |
| Business Acquisition, Pro Forma Net Income (Loss)                                                        |           |           |            |            |            | $ 260.3 | 254.8 |   |
| 2016 Acquisitions [Member]                                                                               |           |           |            |            |            |   |   |   |
| **Business Acquisition [Line Items]**                                                                    |           |           |            |            |            |   |   |   |
| Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual          |           |           | $ 27.4          |            |            |   |   |   |
| Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |           |           | $ (2.2)         |            |            |   |   |   |
| Business Acquisition, Pro Forma Revenue                                                                  |           |           |            |            |            |   | 3,745.6 | $ 3,217.1 |
| Business Acquisition, Pro Forma Net Income (Loss)                                                        |           |           |            |            |            |   | $ 252.2 | $ 187.3 |
| Inpatient Rehabilitation Segment [Member] | 2018 Acquisitions [Member]                                   |           |           |            |            |            |   |   |   |
| **Business Acquisition [Line Items]**                                                                    |           |           |            |            |            |   |   |   |
| Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual          | $ 9.1          |           |            |            |            |   |   |   |
| Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual | $ (1.6)        |           |            |            |            |   |   |   |
| Home Health and Hospice Segment [Member] | 2018 Acquisitions [Member]                                    |           |           |            |            |            |   |   |   |
| **Business Acquisition [Line Items]**                                                                    |           |           |            |            |            |   |   |   |
| Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual          |           |           |            |            | 3.5             |   |   |   |
| Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |           |           |            |            | $ (0.3)         |   |   |   |
| Home Health and Hospice Segment [Member] | Camellia Healthcare [Member]                                  |           |           |            |            |            |   |   |   |
| **Business Acquisition [Line Items]**                                                                    |           |           |            |            |            |   |   |   |
| Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual          |           | $ 50.0         |            |            |            |   |   |   |
| Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |           | $ (0.9)        |            |            |            |   |   |   |

| X                                                                                                                                                                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
+ Details**Name:**us-gaap_BusinessAcquisitionLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.
+ References
Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463
+ Details**Name:**us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.
+ References
Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463
+ Details**Name:**us-gaap_BusinessAcquisitionsProFormaRevenue**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.
+ References
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463
+ Details**Name:**us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.
+ References
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463
+ Details**Name:**us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_BusinessAcquisitionAxis=ehc_A2018AcquisitionsMemberMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_BusinessAcquisitionAxis=ehc_A2017AcquisitionsMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_BusinessAcquisitionAxis=ehc_A2016AcquisitionsMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_StatementBusinessSegmentsAxis=ehc_InpatientRehabilitationSegmentMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_StatementBusinessSegmentsAxis=ehc_HomeHealthandHospiceSegmentMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                    |
|------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_BusinessAcquisitionAxis=ehc_CamelliaHealthcareMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |