Goodwill and Other Intangible Assets, Net - Other Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 230.1	$ 234.1
Accumulated amortization	(121.2)	(105.4)
Finite-live intangible asset, net	108.9	128.7
Indefinite-lived intangible assets, gross/net carrying amount	27.2	27.5
Other intangible assets	257.3	261.6
Other intangible assets, net	136.1	156.2
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	164.1	166.2
Accumulated amortization	(86.2)	(74.4)
Finite-live intangible asset, net	$ 77.9	91.8
Finite-Lived Intangible Asset, Useful Life	12 years 4 months 24 days
Proprietary technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 53.7	54.4
Accumulated amortization	(25.6)	(21.8)
Finite-live intangible asset, net	$ 28.1	32.6
Finite-Lived Intangible Asset, Useful Life	13 years 1 month 6 days
Patents and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 12.3	13.5
Accumulated amortization	(9.4)	(9.2)
Finite-live intangible asset, net	$ 2.9	$ 4.3
Finite-Lived Intangible Asset, Useful Life	10 years