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Derivative Instruments Fair Value and Measurement Inputs (Detail) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
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Derivative [Line Items] |  |
Derivative fair value net asset (liability) | $ 34 | $ 27
Currency exchange contracts |  |
Derivative [Line Items] |  |
Derivative fair value net asset (liability) | (3) | 41
Commodity contracts |  |
Derivative [Line Items] |  |
Derivative fair value net asset (liability) | (60) | 16
Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative fair value net asset (liability) | 97 | (30)
Quoted Prices In Active Markets For Identical Assets (Level 1) |  |
Derivative [Line Items] |  |
Derivative fair value net asset (liability) | (86) | 29
Quoted Prices In Active Markets For Identical Assets (Level 1) | Commodity contracts |  |
Derivative [Line Items] |  |
Derivative fair value net asset (liability) | (86) | 29
Significant Other Observable Inputs (Level 2) |  |
Derivative [Line Items] |  |
Derivative fair value net asset (liability) | 120 | (2)
Significant Other Observable Inputs (Level 2) | Currency exchange contracts |  |
Derivative [Line Items] |  |
Derivative fair value net asset (liability) | (3) | 41
Significant Other Observable Inputs (Level 2) | Commodity contracts |  |
Derivative [Line Items] |  |
Derivative fair value net asset (liability) | 26 | (13)
Significant Other Observable Inputs (Level 2) | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative fair value net asset (liability) | $ 97 | $ (30)

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