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Variable Interest Entities - Textual (Details) - Consolidated Limited Partnership-like Entities [Member] - entity	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Number of consolidated limited partnership-like entities	8	8
Minimum [Member]
Variable Interest Entity [Line Items]
Ownership interest in consolidated entities (percent)	50.00%
Maximum [Member]
Variable Interest Entity [Line Items]
Ownership interest in consolidated entities (percent)	75.00%

X

- 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

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

X

- 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=118582676&loc=SL6759159-111685

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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