Schedule of Committed Credit Facilities (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2012
Line of Credit Facility [Line Items]
Percentage of capital stock of foreign direct subsidiary secured by pledges	66.00%
Revolving Credit Facility Maturing 2016
Line of Credit Facility [Line Items]
Basis spread over variable rate	3.00%
Percentage of capital stock of foreign direct subsidiary secured by pledges	66.00%
Bank Overdraft | Minimum
Line of Credit Facility [Line Items]
Credit and finance leases facilities bearing interest	3.22%
Bank Overdraft | Maximum
Line of Credit Facility [Line Items]
Credit and finance leases facilities bearing interest	5.77%