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Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities (Effective Portion of Cash Flow Hedges) (Details) - Cash Flow Hedging - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in AOCL, Effective Portion | $ 12 | $ (73) | $ (430)
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | (45) | (77) | (125)
Gain (Loss) on Derivative Instruments, Net, Pretax | 2 | 176 | 198
AOCI before tax expected increase (decrease) next 12 months | (90) |  |
Interest Rate Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in AOCL, Effective Portion | (35) | (103) | (421)
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | (101) | (116) | (144)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net | (1) | (6) | (4)
Cross Currency Interest Rate Contract [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in AOCL, Effective Portion | 21 | (20) | (25)
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | 8 | (24) | (23)
Foreign Exchange Contract [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in AOCL, Effective Portion | (4) | 10 | (28)
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | (8) | 32 | 14
Gain (Loss) on Derivative Instruments, Net, Pretax | 19 | 211 | 144
Commodity Contract [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in AOCL, Effective Portion | 30 | 40 | 44
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | 56 | 31 | 28
Gain (Loss) on Derivative Instruments, Net, Pretax | $ (16) | $ (29) | $ 58

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- Definition The pre-tax accumulated other comprehensive income (loss) expected to be recognized as an increase (decrease) to income from continuing operations before income taxes over the next twelve months as of the balance sheet date. + References No definition available. + Details
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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 portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. + 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 (d) -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 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1),(2) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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