Goodwill and Other Identifiable Intangible Assets - Detail of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,652.3	$ 1,621.1
Accumulated amortization	(493.7)	(448.4)
Finite-Lived Intangible Assets, Net	1,158.6	1,172.7
Net, indefinite-life intangibles	465.7	459.1
Cost	2,118.0	2,080.2
Net	1,624.3	1,631.8
Customer relationships
Acquired Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	1,507.6	1,478.0
Accumulated amortization	(392.2)	(346.7)
Finite-Lived Intangible Assets, Net	1,115.4	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	142.8	141.3
Accumulated amortization	(100.0)	(100.3)
Finite-Lived Intangible Assets, Net	$ 42.8	$ 41.0