Goodwill and Other Intangible Assets, Net - Other Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 220.9	$ 126.4
Accumulated amortization	(64.6)	(61.3)
Finite-live intangible asset, net	156.3	65.1
Indefinite-lived intangible assets, gross/net carrying amount	30.9	26.3
Other intangible assets	251.8	152.7
Other intangible assets, net	187.2	91.4
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	157.4	83.1
Accumulated amortization	(45.3)	(38.3)
Finite-live intangible asset, net	$ 112.1	44.8
Finite-Lived Intangible Asset, Useful Life	12 years 4 months
Proprietary technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 54.9	28.1
Accumulated amortization	(12.7)	(9.9)
Finite-live intangible asset, net	$ 42.2	18.2
Finite-Lived Intangible Asset, Useful Life	12 years 11 months
Patents and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 8.6	15.2
Accumulated amortization	(6.6)	(13.1)
Finite-live intangible asset, net	$ 2.0	$ 2.1
Finite-Lived Intangible Asset, Useful Life	9 years 6 months
Wolverine Advanced Materials Acquisition [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 28.6
Wolverine Advanced Materials Acquisition [Member] | Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 16.9
Finite-Lived Intangible Asset, Useful Life	20 years
Wolverine Advanced Materials Acquisition [Member] | Proprietary technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 9.6
Finite-Lived Intangible Asset, Useful Life	20 years
Wolverine Advanced Materials Acquisition [Member] | Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 1.9
Finite-Lived Intangible Asset, Useful Life	1 year
Wolverine Advanced Materials Acquisition [Member] | Brands and Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 0.2
Finite-Lived Intangible Asset, Useful Life	1 year
Hartzell Aerospace Acquisition [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross/net carrying amount	$ 7.0
Other intangible assets	89.0
Hartzell Aerospace Acquisition [Member] | Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 62.0
Finite-Lived Intangible Asset, Useful Life	8 years
Hartzell Aerospace Acquisition [Member] | Proprietary technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 20.0
Finite-Lived Intangible Asset, Useful Life	10 years