Goodwill and Other Intangible Assets - Table 1 (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Changes in the Carrying Amount of Goodwill
Goodwill, Beginning Balance	$ 1,084.0	$ 456.9	$ 437.3
Goodwill, Acquired During Period	806.1	593.1	13.7
Goodwill, Written off Related to Sale of Business Unit			(0.3)
Goodwill, Ending Balance	$ 1,890.1	1,084.0	456.9
Consolidation of Joint Venture [Member]
Schedule of Changes in the Carrying Amount of Goodwill
Goodwill, Period Increase		$ 34.0
Conversion of wholly owned subsidiary to joint venture [Member]
Schedule of Changes in the Carrying Amount of Goodwill
Goodwill, Period Increase			$ 6.2