Restructuring and Relocation Activities - Components of Restructuring Accrual, Spending and Other Activity and Accrual Balance Remaining (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
FUSION [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring accrual at December 31, 2014	$ 5.5
Accrual and accrual adjustments	70.7
Cash payments during 2015	(9.3)
Effect of changes in foreign currency exchange rates	(1.5)
Restructuring accrual at September 30, 2015	65.4
EQIP [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring accrual at December 31, 2014	41.9
Accrual and accrual adjustments	(2.4)
Cash payments during 2015	(24.0)
Effect of changes in foreign currency exchange rates	(3.5)
Restructuring accrual at September 30, 2015	12.0
IOP [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring accrual at December 31, 2014	13.1
Accrual and accrual adjustments	(0.3)
Cash payments during 2015	(7.0)
Effect of changes in foreign currency exchange rates	(0.7)
Restructuring accrual at September 30, 2015	$ 5.1