Goodwill and Other Intangible Assets, net - Other Intangibles and Amortization (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Other intangible assets, net
Other intangible assets, Acquired Cost	$ 1,368.1	$ 1,157.9
Other intangible assets, Accumulated Amortization	(349.5)	(285.7)
Other intangible assets, net	1,018.6	872.2
Trade names
Assets not subject to amortization:
Trade names	275.4	237.5
Customer relationships
Other intangible assets
Acquired Cost	833.6	704.3
Accumulated Amortization	(244.7)	(201.6)
Net Book Value	588.9	502.7
Intellectual property
Other intangible assets
Acquired Cost	242.5	200.7
Accumulated Amortization	(92.4)	(72.4)
Net Book Value	150.1	128.3
Other
Other intangible assets
Acquired Cost	16.6	15.4
Accumulated Amortization	(12.4)	(11.7)
Net Book Value	$ 4.2	$ 3.7