Goodwill and Other Intangible Assets, net - Other Intangibles and Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Other intangible assets
Accumulated Amortization	$ (375.0)	$ (285.7)
Other intangible assets, net
Other intangible assets, Acquired Cost	1,609.4	1,157.9
Other intangible assets, net	1,234.4	872.2
Estimated amortization expense
2018	112.2
2019	111.6
2020	108.6
2021	103.4
2022	94.5
Thereafter	$ 428.3
Useful life of finite lived intangible assets	10 years
Trade names
Assets not subject to amortization:
Indefinite-lived intangible assets	$ 275.8	237.5
Intellectual Property
Estimated amortization expense
Useful life of finite lived intangible assets	7 years 3 months 18 days
Technology and intellectual property
Other intangible assets
Acquired Cost	$ 309.4	200.7
Accumulated Amortization	(100.7)	(72.4)
Net Book Value	208.7	128.3
Customer relationships
Other intangible assets
Acquired Cost	979.6	704.3
Accumulated Amortization	(260.6)	(201.6)
Net Book Value	$ 719.0	502.7
Estimated amortization expense
Useful life of finite lived intangible assets	10 years 9 months 18 days
Other intangibles
Other intangible assets
Acquired Cost	$ 44.6	15.4
Accumulated Amortization	(13.7)	(11.7)
Net Book Value	$ 30.9	$ 3.7
Estimated amortization expense
Useful life of finite lived intangible assets	9 years 1 month 6 days