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Business Combinations - Net Cash Paid for Acquisitions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Net cash paid for acquisition			$ 36.6	$ 19.6
Home Health and Hospice Segment [Member] | Celtic, Community, Bio Care, and VNA [Member]
Business Acquisition [Line Items]
Fair value of assets acquired	$ 2.7	$ 1.9	5.4	3.4
Goodwill	13.1	8.3	20.5	16.3
Fair value of liabilities assumed	(0.1)	0.0	(0.2)	(0.1)
Net cash paid for acquisition	15.7	10.2	25.7	19.6
Inpatient Rehabilitation Segment [Member] | Gulfport, Mount Carmel, Jackson and Heritage Valley [Member]
Business Acquisition [Line Items]
Fair value of assets acquired	5.4	1.4	11.0	6.7
Goodwill	9.0	7.6	24.0	9.4
Far value of noncontrolling interest owned by joint venture partner	(14.4)	(9.0)	(24.1)	(16.1)
Net cash paid for acquisition	$ 0.0	$ 0.0	$ 10.9	$ 0.0

X

- Definition

This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.

+ References

No definition available.

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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.

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- Definition

The fair value of assets acquired in noncash investing or financing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
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- Definition

The total amount of [all] liabilities that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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