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Components of Net Pension Cost (Detail) (Pension Plans, USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
U.S. Pension Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 71 $ 142 $ 146
Interest cost 60 275 364
Expected return on plan assets (67) (358) (496)
Net loss from experience differences 55 253 225
Prior service cost 2 6 7
Other expenses 1 113 105
Net periodic pension cost 122 168 118
Non-U.S. Pension Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 172 172 170
Interest cost 358 425 458
Expected return on plan assets (435) (494) (536)
Net loss from experience differences 136 121 101
Prior service cost 1 3 2
Other expenses 3 22 14
Net periodic pension cost 235 220 180
Segment, Discontinued Operations | U.S. Pension Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Net periodic pension cost   (263) (233)
Segment, Discontinued Operations | Non-U.S. Pension Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Net periodic pension cost   $ (29) $ (29)