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Amount of assets acquired at the acquisition date.

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Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Business Combinations - Table 3 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Acquisition [Line Items]
Total current assets		$ 12.1
Property and equipment, net		36.9
Goodwill	1,084.0us-gaap_Goodwill	34.6us-gaap_Goodwill	456.9us-gaap_Goodwill	437.3us-gaap_Goodwill	421.7us-gaap_Goodwill
Total assets acquired		99.8
Total current liabilities assumed		(7.8)
Total long-term liabilities		(13.4)
Net assets acquired		78.6
Noncompete Agreements [Member]
Business Acquisition [Line Items]
Identifiable intangible assets	5.6	0.4
Noncompete Agreements [Member] \| Minimum [Member]
Useful Lives of Acquired Finite-Lived Intangible Assets [Abstract]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	2 years
Noncompete Agreements [Member] \| Maximum [Member]
Useful Lives of Acquired Finite-Lived Intangible Assets [Abstract]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	3 years
Trade Names [Member]
Business Acquisition [Line Items]
Identifiable intangible assets		2.9
Useful Lives of Acquired Finite-Lived Intangible Assets [Abstract]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	20 years
Certificates of need [Member]
Business Acquisition [Line Items]
Identifiable intangible assets		10.8
Useful Lives of Acquired Finite-Lived Intangible Assets [Abstract]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	20 years
License [Member]
Business Acquisition [Line Items]
Identifiable intangible assets	58.2	$ 2.1
Useful Lives of Acquired Finite-Lived Intangible Assets [Abstract]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	20 years