Goodwill and Intangible Assets, net - Other Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 1,035.2	$ 1,037.4
Accumulated Amortization	(305.0)	(271.2)
Tradenames and other	53.6	53.3
Total intangible assets	1,088.8	1,090.7
Patents, tradenames and trademarks
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	201.7	204.4
Accumulated Amortization	(60.5)	(58.6)
Customer/agent relationships and other
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	833.5	833.0
Accumulated Amortization	$ (244.5)	$ (212.6)