Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 388.3		$ 388.3		$ 395.5
Accumulated Amortization	214.0		214.0		204.7
Net Amount	174.3		174.3		190.8
Indefinite-lived Intangible Assets [Line Items]
Gross Amount	527.4		527.4		537.1
Accumulated Amortization	214.0		214.0		204.7
Net Amount	313.4		313.4		332.4
Amortization of intangible assets	6.7	$ 7.1	13.5	$ 14.1
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	42.7		42.7		43.3
Accumulated Amortization	24.0		24.0		22.5
Net Amount	18.7		18.7		20.8
Indefinite-lived Intangible Assets [Line Items]
Accumulated Amortization	24.0		24.0		22.5
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	114.4		114.4		119.7
Accumulated Amortization	50.9		50.9		48.1
Net Amount	63.5		63.5		71.6
Indefinite-lived Intangible Assets [Line Items]
Accumulated Amortization	50.9		50.9		48.1
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	231.2		231.2		232.5
Accumulated Amortization	139.1		139.1		134.1
Net Amount	92.1		92.1		98.4
Indefinite-lived Intangible Assets [Line Items]
Accumulated Amortization	139.1		139.1		134.1
Trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
Trademarks, not subject to amortization	$ 139.1		$ 139.1		$ 141.6