Defined Benefit Pension Plans and Other Post-Employment Benefit Plans - Components of Net periodic Benefit Cost (Income) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2.5	$ 2.4	$ 7.9	$ 7.4
Interest cost	9.8	11.9	29.4	36.0
Expected return on plan assets	(13.2)	(13.5)	(39.5)	(40.6)
Amortization of net actuarial loss	2.8	2.4	8.4	7.4
Net periodic benefit cost (income)	1.9	3.2	6.2	10.2
Cost (income) of settlement/curtailment	0.1	0.5	0.5	1.6
Total benefit cost (income)	2.0	3.7	6.7	11.8
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.2	0.5	0.7
Interest cost	2.2	2.1	6.5	6.5
Expected return on plan assets	(2.9)	(2.8)	(8.6)	(8.4)
Amortization of net actuarial loss	0.4	0.2	1.3	0.6
Net periodic benefit cost (income)	(0.2)	(0.3)	(0.3)	(0.6)
Cost (income) of settlement/curtailment			1.1
Total benefit cost (income)	(0.2)	(0.3)	0.8	(0.6)
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.4	2.2	7.4	6.7
Interest cost	7.6	9.8	22.9	29.5
Expected return on plan assets	(10.3)	(10.7)	(30.9)	(32.2)
Amortization of net actuarial loss	2.4	2.2	7.1	6.8
Net periodic benefit cost (income)	2.1	3.5	6.5	10.8
Cost (income) of settlement/curtailment	0.1	0.5	(0.6)	1.6
Total benefit cost (income)	2.2	4.0	5.9	12.4
Other Employee Benefits Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.2	0.6	0.6
Interest cost	0.7	0.8	2.2	2.4
Amortization of net prior service cost	(0.3)	(0.2)	(0.7)	(0.6)
Amortization of net actuarial loss	0.1		0.3	0.1
Net periodic benefit cost (income)	$ 0.6	$ 0.8	$ 2.4	$ 2.5