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Employee Benefit Plans - Assumption Rates Used for Net Periodic Benefit Costs (Detail)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
United States plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate: 4.58% 4.95% 5.26%
Expected return on assets: 6.33%   7.50%
Expected return on assets, minimum:   5.50%  
Expected return on assets, maximum:   6.50%  
International plans [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate minimum: 4.50% 5.25% 5.25%
Discount rate maximum: 5.60% 5.60% 5.75%
Salary increase minimum: 2.00% 2.00% 2.50%
Salary increase maximum: 4.00% 4.33% 4.25%
Expected return on assets, minimum: 4.50% 4.50% 6.00%
Expected return on assets, maximum: 6.51% 7.06% 6.85%