Condensed Consolidating Financial Information - Narrative (Details)	Sep. 30, 2018
Condensed Financial Information Disclosure [Abstract]
Senior secured leverage ratio maximum	2
Consolidated coverage ratio minimum	2

Minimum consolidated coverage ratio to permit the declaration and payment of dividends under senior note indenture.

No definition available.

Name:	ehc_Consolidatedcoverageratiominimum
Namespace Prefix:	ehc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant