Employee Benefits - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to the plans	$ 4.1	$ 12.2
Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan		6
Contribution to other postretirement plans	1.3	3.9
Non-Qualified U.S. Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to the plans	1.0	3.0
Minimum | Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan	15	15
Minimum | Qualified U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan	15	15
Maximum | Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan	20	20
Maximum | Qualified U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan	$ 20	$ 20