Intangible Assets - Summary of Changes (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($)
Summary of the changes in the carrying amount of goodwill and other indefinite-lived intangible assets
Goodwill, Beginning Balance	$ 1,291.2
Goodwill, Additions	326.1
Goodwill, Disposals	(1.9)
Goodwill, Foreign currency translation	45.0
Goodwill, Ending Balance	1,660.4
Other indefinite-lived intangible assets, Beginning Balance	420.1
Other indefinite-lived intangible assets, Additions	40.8
Other indefinite-lived intangible assets, Disposals	(1.5)
Other indefinite-lived intangible assets, Foreign currency translation	13.9
Other indefinite-lived intangible assets, Ending Balance	$ 473.3