Goodwill and Intangible Assets, net - Other Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 582.2	$ 549.6
Accumulated Amortization	(199.2)	(171.4)
Total intangible assets	636.3	602.9
Tradenames and other
Other Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	54.1	53.3
Patents, tradenames and trademarks
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	151.1	143.7
Accumulated Amortization	(49.1)	(43.4)
Customer/agent relationships and other
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	431.1	405.9
Accumulated Amortization	$ (150.1)	$ (128.0)