Pension and Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Interest cost	0.2	0.2	0.4	0.4
Expected return on plan assets
Amortization of actuarial loss	0.1	0.1	0.2	0.1
Net period benefit cost (income)	0.3	0.3	0.6	0.5
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Interest cost	2.2	2.4	4.4	4.8
Expected return on plan assets	(3.0)	(3.0)	(6.0)	(6.0)
Amortization of actuarial loss	0.7	0.5	1.2	1.0
Net period benefit cost (income)	(0.1)	(0.1)	(0.4)	(0.2)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Interest cost	0.1	0.2	0.3	0.4
Expected return on plan assets
Amortization of actuarial loss	0.1		0.1
Net period benefit cost (income)	$ 0.2	$ 0.2	$ 0.4	$ 0.4