Intangible Assets - Summary of Changes (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Summary of the changes in the carrying amount of goodwill and other indefinite-lived intangible assets
Goodwill, Beginning balance	$ 1,660.5
Goodwill, Additions	61.8
Goodwill, Disposals	(6.7)
Goodwill, Foreign currency translation	16.2
Goodwill, Ending balance	1,731.8
Other indefinite-lived intangible assets, Beginning Balance	474.0
Other indefinite-lived intangible assets, Additions	7.7
Other indefinite-lived intangible assets, Disposals	(3.3)
Other indefinite-lived intangible assets, Foreign currency translation	3.0
Other indefinite-lived intangible assets, Ending Balance	$ 481.4