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Pensions and Other Post-Retirement Benefits - Total Accumulated Benefit Obligation and Minimum Liability Changes For Pension Plans (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Pension Plans Postretirement And Other Employee Benefits [Line Items]      
Accumulated benefit obligation $ 1,622 $ 1,548 $ 1,803
Accumulated Benefit Obligation      
Pension Plans Postretirement And Other Employee Benefits [Line Items]      
Projected benefit obligation 1,541 1,421  
Accumulated benefit obligation 1,523 1,381  
Fair value of plan assets 1,244 1,193  
Projected Benefit Obligation      
Pension Plans Postretirement And Other Employee Benefits [Line Items]      
Projected benefit obligation 1,541 1,421  
Accumulated benefit obligation 1,523 1,381  
Fair value of plan assets 1,244 1,193  
The Netherlands | Accumulated Benefit Obligation      
Pension Plans Postretirement And Other Employee Benefits [Line Items]      
Projected benefit obligation 669 578  
Accumulated benefit obligation 668 577  
Fair value of plan assets 625 560  
The Netherlands | Projected Benefit Obligation      
Pension Plans Postretirement And Other Employee Benefits [Line Items]      
Projected benefit obligation 669 578  
Accumulated benefit obligation 668 577  
Fair value of plan assets 625 560  
United States | Accumulated Benefit Obligation      
Pension Plans Postretirement And Other Employee Benefits [Line Items]      
Projected benefit obligation 344 334  
Accumulated benefit obligation 344 334  
Fair value of plan assets 233 231  
United States | Projected Benefit Obligation      
Pension Plans Postretirement And Other Employee Benefits [Line Items]      
Projected benefit obligation 344 334  
Accumulated benefit obligation 344 334  
Fair value of plan assets 233 231  
Other | Accumulated Benefit Obligation      
Pension Plans Postretirement And Other Employee Benefits [Line Items]      
Projected benefit obligation 528 509  
Accumulated benefit obligation 511 470  
Fair value of plan assets 386 402  
Other | Projected Benefit Obligation      
Pension Plans Postretirement And Other Employee Benefits [Line Items]      
Projected benefit obligation 528 509  
Accumulated benefit obligation 511 470  
Fair value of plan assets $ 386 $ 402