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Pensions and Other Post-Retirement Benefits - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Curtailment gains   $ 1 $ 2
Defined contribution plan expenses 37 37 35
Percentage of contribution by the employer, minimum 3.00%    
The Netherlands [Member]
     
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Contribution to pension plan 7    
Other [Member]
     
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Contribution to pension plan $ 40    
Equity securities [Member]
     
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Allocation of assets 40.00%    
Fixed income securities [Member]
     
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Allocation of assets 56.00%    
Other [Member]
     
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Allocation of assets 4.00%