Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 1,037.4	$ 613.4
Accumulated Amortization	(271.2)	(206.8)
Indefinite-lived intangible assets (excluding goodwill)	53.3	53.8
TOTAL INTANGIBLE ASSETS	1,090.7	667.2
Patents, tradenames and trademarks
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	204.4	151.4
Accumulated Amortization	(58.6)	(50.1)
Customer/agent relationships and other
Other Intangible Assets [Line Items]
Finite-lived intangible assets, gross	833.0	462.0
Accumulated Amortization	$ (212.6)	$ (156.7)