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Hedges and Derivative Financial Instruments - Schedule of Outstanding Derivative Contracts (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015
Derivatives, Fair Value [Line Items] |  |
Fair value of hedged assets | $ 59 | $ 54
Fair value of hedged liabilities | 80 | 96
Derivative asset at fair value, current | 53 | 54
Derivative asset at fair value, noncurrent | 6 | 0
Total derivatives, hedge assets at fair value | 59 | 54
Derivative liability at fair value, current | 75 | 79
Derivative liability at fair value, noncurrent | 5 | 17
Total derivatives, hedge liabilities at fair value | 80 | 96
Derivatives accounted for as hedges |  |
Derivatives, Fair Value [Line Items] |  |
Fair value of hedged assets | 40 | 32
Fair value of hedged liabilities | 47 | 74
Derivatives accounted for as hedges | Foreign exchange forwards/options |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 955 | 886
Fair value of hedged assets | 26 | 31
Fair value of hedged liabilities | $ 21 | $ 8
Maximum term of foreign exchange forwards/options | 13 months | 12 months
Derivatives accounted for as hedges | Commodity swaps/options |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 306 | $ 322
Fair value of hedged assets | 14 | 1
Fair value of hedged liabilities | $ 26 | $ 66
Maximum term of commodity swaps/options | 33 months | 33 months
Derivatives not accounted for as hedges |  |
Derivatives, Fair Value [Line Items] |  |
Fair value of hedged assets | $ 19 | $ 22
Fair value of hedged liabilities | 33 | 22
Derivatives not accounted for as hedges | Foreign exchange forwards/options |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 2,028 | 2,886
Fair value of hedged assets | 19 | 22
Fair value of hedged liabilities | $ 33 | $ 21
Maximum term of foreign exchange forwards/options | 11 months | 11 months
Derivatives not accounted for as hedges | Commodity swaps/options |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 1 | $ 7
Fair value of hedged assets | 0 | 0
Fair value of hedged liabilities | $ 0 | $ 1
Maximum term of commodity swaps/options | 8 months | 6 months

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- Definition Maximum period of time the entity is hedging its exposure to variability in future cash flows for forecasted transactions, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Excludes forecasted transactions related to payment of variable interest on existing financial instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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