Business Acquisitions (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 992.0	$ 928.5
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Tangible assets acquired	66.2
Intangible assets	92.6
Goodwill	66.9
Net deferred taxes	(8.7)
Other liabilities assumed	(31.2)
TOTAL CONSIDERATION, NET OF CASH RECEIVED	$ 185.8