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Redeemable Noncontrolling Interests Redeemable Noncontrolling Interests - Textuals (Details) - USD ($)	Feb. 21, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2014
Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests		$ 220,900,000	$ 138,300,000
EHHI [Member]
Noncontrolling Interest [Line Items]
Outstanding common stock of Holdings, Fair Value		$ 192,000,000
Home Health and Hospice Segment [Member] | EHHI [Member]
Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests				$ 64,000,000
Subsidiary's common stock held by subsidiary 's management, Percent				16.70%
Subsequent Event [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	$ 0.056
Payments to settle the acquisition of Holdings common stock	$ 65,000,000

X

- Definition

The amount of subsidiary's common stock held by subsidiary 's management, Percent

+ References

No definition available.

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- Definition

Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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-Section 45
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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

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- Definition

The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Section 45
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- Definition

As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 480
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-Paragraph 3A
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Fair value of noncontrolling interests which are redeemable by the parent entity and classified as other equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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