Defined Benefit Pension Plans and Other Post-Employment Benefit Plans - Components of Net periodic Benefit Cost (Income) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2.0	$ 2.6
Interest cost	7.1	8.3
Expected return on plan assets	(12.6)	(11.6)
Amortization of net actuarial loss	2.8	2.8
Net periodic benefit cost (income)	(0.7)	2.1
Cost of settlement/curtailment	0.5	0.1
Total benefit cost (income)	(0.2)	2.2
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.1
Interest cost	1.8	1.9
Expected return on plan assets	(2.5)	(2.5)
Amortization of net actuarial loss	0.2	0.5
Net periodic benefit cost (income)	(0.5)
Total benefit cost (income)	(0.5)
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.0	2.5
Interest cost	5.3	6.4
Expected return on plan assets	(10.1)	(9.1)
Amortization of net actuarial loss	2.6	2.3
Net periodic benefit cost (income)	(0.2)	2.1
Cost of settlement/curtailment	0.5	0.1
Total benefit cost (income)	0.3	2.2
Other Employee Benefits Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.5	0.5
Amortization of net prior service cost	$ (0.5)	(0.4)
Net periodic benefit cost		$ 0.1