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Variable Interest Entities - Textuals (Details) - Variable Interest Entity, Primary Beneficiary - entity | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Variable Interest Entity [Line Items] |  |
Number of consolidated limited partnership-like entities | 9 | 8
Minimum |  |
Variable Interest Entity [Line Items] |  |
Ownership interest in the consolidated entities (percent) | 50.00% |
Maximum |  |
Variable Interest Entity [Line Items] |  |
Ownership interest in the consolidated entities (percent) | 75.00% |

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- Definition Number of facilities consolidated as variable interest entities. + References No definition available. + Details
Name: | ehc_VariableInterestEntityNumberofEntitiesConsolidated
Namespace Prefix: | ehc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- 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_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121559654&loc=SL6759159-111685 + Details
Name: | us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |