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Pension Plans Resulted in Net Pension Liability (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]    
Prepaid pension assets $ 69 $ 53
Other accrued liabilities (31) (23)
Accrued pension costs (2,183) (2,912)
Total (2,145) (2,882)
U.S. Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Projected benefit obligation 1,566 1,606
Accumulated benefit obligation 1,463 1,474
Fair value of plan assets 1,247 1,216
Non-U.S. Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Projected benefit obligation 8,139 10,108
Accumulated benefit obligation 7,920 9,763
Fair value of plan assets $ 6,252 $ 7,576