Business Combinations Business Combinations - Table 8 (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 806.1	$ 593.1	$ 13.7
Payments to Acquire Businesses, Net of Cash Acquired	985.1	694.8	28.9
Home Health and Hospice [Member]
Business Acquisition [Line Items]
Fair value of assets acquired	10.4	0.0	0.0
Goodwill, Acquired During Period	20.3	0.0	0.0
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed	(0.2)	0.0	0.0
Payments to Acquire Businesses, Net of Cash Acquired	$ 30.5	$ 0.0	$ 0.0