Goodwill and Other Identifiable Intangible Assets - Detail of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,624.1	$ 1,621.1
Accumulated amortization	(463.8)	(448.4)
Finite-Lived Intangible Assets, Net	1,160.3	1,172.7
Net, indefinite-life intangibles	462.2	459.1
Cost	2,086.3	2,080.2
Net	1,622.5	1,631.8
Customer relationships
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	1,482.4	1,478.0
Accumulated amortization	(366.8)	(346.7)
Finite-Lived Intangible Assets, Net	1,115.6	1,131.3
Trade names intangibles
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	1.9	1.8
Accumulated amortization	(1.5)	(1.4)
Finite-Lived Intangible Assets, Net	0.4	0.4
Patented Technology [Member]
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	139.8	141.3
Accumulated amortization	(95.5)	(100.3)
Finite-Lived Intangible Assets, Net	$ 44.3	$ 41.0