Summary of Weighted-Average Assumptions Used in Determining Benefit Obligations (Detail)	Dec. 31, 2012	Dec. 31, 2011
U.S. Benefit Plans
Schedule of Net Periodic Benefit Costs Weighted Average Assumptions [Line Items]
Discount rate	4.20%	5.00%
Rate of increase in compensation levels	3.50%	3.50%
Non-U.S. Benefit Plan
Schedule of Net Periodic Benefit Costs Weighted Average Assumptions [Line Items]
Discount rate	4.10%	4.60%