Postretirement Health Care Plan Net Periodic (Benefit) Expense (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
U.S. Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	$ 7.6	$ 8.8
Interest Cost	10.5	10.4
Expected Return on Plan Assets	(23.1)	(21.8)
Amortization
Net Actuarial (Gain) Loss	10.4	8.6
Prior Service Cost	(0.1)	(0.1)
Net Periodic Pension Expense	5.3	5.9
Non U.S. Plans
Defined Benefit plan Net periodic benefit cost
Interest Cost	1.7	1.6
Expected Return on Plan Assets	(1.5)	(1.6)
Amortization
Net Actuarial Loss Amortization	0.1	0.2
Net Periodic Pension Expense	0.3	0.2
Supplemental Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	0.4	0.7
Interest Cost	1.1	1.1
Amortization
Net Actuarial (Gain) Loss	1.7	1.5
Prior Service Cost	0.1	0.1
Net Periodic Pension Expense	3.3	3.4
Other Postretirement Plan
Defined Benefit plan Net periodic benefit cost
Service Cost		0.1
Interest Cost	0.3	0.4
Amortization
Net Actuarial (Gain) Loss	(0.3)	(0.3)
Prior Service Cost	(0.7)	(1.3)
Net Periodic Pension Expense	$ (0.7)	$ (1.1)