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Fair Value (Quantitative Information) (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | $ 81 | $ (24) | $ 5
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Assets Liabilities Value | 81 |  |
Foreign Exchange Contract [Member] |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | 255 | 277 | 209
Interest Rate Contract |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | $ (179) | (304) | (210)
Interest Rate Contract | Minimum |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Fair Value Inputs, Entity Credit Risk | 2.10% |  |
Interest Rate Contract | Maximum |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Fair Value Inputs, Entity Credit Risk | 4.40% |  |
Interest Rate Contract | Weighted Average |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Fair Value Inputs, Entity Credit Risk | 4.30% |  |
Commodity Contract [Member] |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | $ 5 | $ 3 | $ 6
Argentina, Pesos | Foreign Exchange Contract [Member] |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | $ 255 |  |
Argentina, Pesos | Foreign Exchange Contract [Member] | Minimum |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Derivative, Forward Exchange Rate | 0.199 |  |
Argentina, Pesos | Foreign Exchange Contract [Member] | Maximum |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Derivative, Forward Exchange Rate | 0.334 |  |
Argentina, Pesos | Foreign Exchange Contract [Member] | Weighted Average |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |
Derivative, Forward Exchange Rate | 0.264 |  |

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- Definition Risk associated with risk of default, credit spread risk and downgrade risk, expressed as a percentage, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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