Goodwill and Intangible Assets, net - Other Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 1,036.1	$ 1,037.4
Accumulated Amortization	(287.5)	(271.2)
Indefinite-lived intangible assets (excluding goodwill)	53.5	53.3
Total intangible assets	1,089.6	1,090.7
Patents, tradenames and trademarks
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	201.9	204.4
Accumulated Amortization	(58.2)	(58.6)
Customer/agent relationships and other
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	834.2	833.0
Accumulated Amortization	$ (229.3)	$ (212.6)