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Derivative and Other Financial Instruments (Accumulated Other Comprehensive Income ("AOCI") and Earnings from Changes in Fair Value Related to Derivative Instruments) (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain/(loss) recognized in AOCI (effective portion) | $ 21 | $ (2)
Amount of gain/(loss) reclassified from AOCI into earnings | 1 | (3)
Foreign Exchange [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain/(loss) recognized in AOCI (effective portion) | (2) | 0
Amount of gain/(loss) reclassified from AOCI into earnings | (2) | 2
Commodities [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain/(loss) recognized in AOCI (effective portion) | 23 | (2)
Amount of gain/(loss) reclassified from AOCI into earnings | $ 3 | $ (5)

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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