Significant Weighted Average Assumptions Used in Measurement of Pension Benefit Obligation (Detail)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
United States Pension Plans of US Entity, Defined Benefit
Pension benefit obligations:
Discount rate	4.57%	5.23%	5.79%
Net periodic benefit cost:
Discount rate	5.23%	5.79%	6.44%
Expected return on plan assets	7.50%	7.50%	7.50%
Foreign Pension Plans, Defined Benefit
Pension benefit obligations:
Discount rate	4.98%	4.87%	5.36%
Net periodic benefit cost:
Discount rate	4.87%	5.36%	5.80%
Rate of compensation increase	3.21%	3.19%	3.21%
Expected return on plan assets	4.09%	4.12%	6.03%