Other Intangible Assets Textuals (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 0.0
Amortization expense related to finite-lived intangible assets	$ 14.0	$ 11.1	$ 17.6
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average period (in years)	12 years 4 months
Proprietary technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average period (in years)	12 years 11 months
Patents and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average period (in years)	9 years 6 months
Control Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 1.8