Components of Company's Net Periodic Benefit Cost (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 8.8	$ 10.7
Interest Cost	10.4	10.2
Expected Return on Plan Assets	(21.8)	(19.7)
Amortization
Net Loss	8.6	6.5
Prior Service Cost	(0.1)	0.4
Net Periodic Benefit Expense (Benefit)	5.9	8.1
Foreign Pension Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest Cost	1.6	1.6
Expected Return on Plan Assets	(1.6)	(2.0)
Amortization
Net Loss	0.2
Gain on Curtailment of Non-U.S. Plan
Net Periodic Benefit Expense (Benefit)	0.2	(0.4)
Supplemental Employee Retirement Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0.7	0.8
Interest Cost	1.1	1.1
Amortization
Net Loss	1.5	1.4
Prior Service Cost	0.1	0.1
Net Periodic Benefit Expense (Benefit)	3.4	3.4
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0.1	0.1
Interest Cost	0.4	0.7
Amortization
Net Loss	(0.3)	0.4
Prior Service Cost	(1.3)	(1.3)
Net Periodic Benefit Expense (Benefit)	$ (1.1)	$ (0.1)