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Effects of Cash Flow Hedges (Detail) - Cash Flow Hedges - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains / (losses) reclassified from AOCI into earnings | $ (7) | $ (58)
Gains / (losses) recognized in OCI | 11 | (66)
Currency exchange contracts | Forecasted transactions |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains / (losses) reclassified from AOCI into earnings |  | 5
Gains / (losses) recognized in OCI | (6) | (12)
Commodity contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains / (losses) reclassified from AOCI into earnings | (7) | (3)
Gains / (losses) recognized in OCI | (1) | (5)
Interest rate contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains / (losses) reclassified from AOCI into earnings |  | (60)
Gains / (losses) recognized in OCI | $ 18 | $ (49)

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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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