Employee Benefit Plans - Components of Net Periodic Benefit Cost (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 9.9	$ 13.1	$ 10.4
Interest cost	21.7	21.1	22.3
Expected return on plan assets	(20.0)	(18.5)	(17.0)
Settlement gain	(0.3)
Curtailment loss (gain)		7.3
Recognized actuarial losses	10.0	12.5	7.9
Amortization of prior service cost	0.5	1.1	1.1
Amortization of net transition obligations	0.1	0.4	0.4
Total	21.9	37.0	25.1
United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.8	0.7	0.8
Expected return on plan assets	(1.2)	(1.4)	(1.3)
Recognized actuarial losses	0.3	0.5	0.5
Total	(0.1)	(0.2)
OPEB
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.3	0.3
Interest cost	0.4	0.6	0.6
Curtailment loss (gain)		(0.6)
Recognized actuarial losses	0.2	0.3	0.3
Amortization of prior service cost	(0.9)	(0.6)	(0.6)
Total	$ (0.2)		$ 0.6