Employee Benefit Plans - Components of Net Periodic Defined Benefit Pension Benefit Cost (Credit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 2.7	$ 2.7	$ 2.9
Expected return on plan assets	(3.4)	(3.9)	(4.0)
Amortization of unrecognized net actuarial loss	1.9	1.7	1.2
Total	1.2	0.5	0.1
Foreign Pension Plan Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	9.9	11.2	9.9
Interest cost	15.1	15.1	22.2
Settlement gain			(0.3)
Curtailment loss			0.1
Expected return on plan assets	(14.9)	(17.3)	(20.6)
Amortization of unrecognized prior service credit	0.2	0.4	0.5
Amortization of unrecognized net actuarial loss	11.4	13.8	10.1
Total	21.7	23.2	21.9
OPEB
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.1	0.1
Interest cost	0.5	0.5	0.6
Amortization of unrecognized prior service credit	(1.8)	(1.9)	(2.0)
Amortization of unrecognized net actuarial loss	(0.1)		(0.2)
Total	$ (1.3)	$ (1.3)	$ (1.5)