Income Tax Expense Allocated to Each Component of Other Comprehensive Income (Loss) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income [Line Items]
Translation adjustments - Before Tax Amount	$ 8.7	$ (25.8)	$ (0.3)	$ (18.7)
Adjustment for net periodic pension and other postretirement benefits plan cost - Before Tax Amount	2.0	7.6	3.4	15.4
Change in fair value of derivatives - Before Tax Amount	0.1	0.1	0.2	0.2
Other comprehensive income (loss) - Before Tax Amount	10.8	(18.1)	3.3	(3.1)
Adjustment for net periodic pension and other postretirement benefits plan cost - Income Tax Expense	0.6	2.8	1.1	11.5
Change in fair value of derivatives - Income Tax Expense	0	0.1	0.1	0.1
Other comprehensive income (loss) - Income Tax Expense	0.6	2.9	1.2	11.6
Translation adjustments - Net of Tax Amount	8.7	(25.8)	(0.3)	(18.7)
Adjustment for net periodic pension and other postretirement benefits plan cost	1.4	4.8	2.3	3.9
Change in fair value of derivatives - Net of Tax Amount	0.1	0	0.1	0.1
Other comprehensive income (loss) - Net of Tax Amount	$ 10.2	$ (21.0)	$ 2.1	$ (14.7)