XML 82 R113.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Earnings per Common Share - Schedule of Warrant Activity (Details) - $ / shares shares in Millions | 1 Months Ended |  |
--- | --- | --- | ---
Jan. 17, 2017 | Dec. 31, 2016 | Sep. 30, 2009
Warrants and Rights Note Disclosure Roll Forward [Abstract] |  |  |
Common stock warrants outstanding as of December 31, 2016 | 8.2 |  |
Expired | (1.1) |  |
Common stock warrants outstanding as of January 17, 2017 | 0.0 |  |
Weighted average exercise price (in dollars per share) | $ 41.40 | $ 41.40 | $ 41.40
Cashless exercise |  |  |
Warrants and Rights Note Disclosure Roll Forward [Abstract] |  |  |
Exercised | (6.5) |  |
Weighted average exercise price (in dollars per share) | $ 41.40 |  |
Cash exercise |  |  |
Warrants and Rights Note Disclosure Roll Forward [Abstract] |  |  |
Exercised | (0.6) |  |
Weighted average exercise price (in dollars per share) | $ 41.40 |  |

X
- Definition Number of warrants for which the right to exercise has lapsed under the terms of the contract or agreement. + References No definition available. + Details
Name: | ehc_ClassOfWarrantOrRightNumberofSecuritiesExpired
Namespace Prefix: | ehc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Warrants and Rights Note Disclosure Roll Forward [Abstract] + References No definition available. + Details
Name: | ehc_WarrantsandRightsNoteDisclosureRollForwardAbstract
Namespace Prefix: | ehc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=ehc_CashlessexerciseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=ehc_CashexerciseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |