Goodwill and Other Identifiable Intangible Assets - Detail of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,646.0	$ 1,621.1
Accumulated amortization	(507.3)	(448.4)
Finite-Lived Intangible Assets, Net	1,138.7	1,172.7
Net, indefinite-life intangibles	468.6	459.1
Cost	2,114.6	2,080.2
Net	1,607.3	1,631.8
Customer relationships
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	1,513.2	1,478.0
Accumulated amortization	(415.1)	(346.7)
Finite-Lived Intangible Assets, Net	1,098.1	1,131.3
Trade names intangibles
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	1.5	1.8
Accumulated amortization	(1.4)	(1.4)
Finite-Lived Intangible Assets, Net	0.1	0.4
Patented Technology [Member]
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	131.3	141.3
Accumulated amortization	(90.8)	(100.3)
Finite-Lived Intangible Assets, Net	$ 40.5	$ 41.0