Intangible Assets - Summary of Changes (Details) $ in Millions	9 Months Ended
	Sep. 30, 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	65.0
Goodwill, Disposals	(6.7)
Goodwill, Foreign currency translation	(26.2)
Goodwill, Ending balance	1,692.6
Other indefinite-lived intangible assets, Beginning Balance	474.0
Other indefinite-lived intangible assets, Additions	8.9
Other indefinite-lived intangible assets, Disposals	(3.3)
Other indefinite-lived intangible assets, Foreign currency translation	(7.7)
Other indefinite-lived intangible assets, Ending Balance	$ 471.9