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Effects of Cash Flow Hedges (Detail) (Cash Flow Hedges, USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gains / (losses) reclassified from AOCI into earnings | $ 2 | $ (15) | $ 3 | $ (32)
Gains / (losses) recognized in OCI | (36) | 57 | (70) | 78
Currency exchange contracts | Forecasted transactions |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gains / (losses) reclassified from AOCI into earnings | (2) | (4) | (4) | (12)
Gains / (losses) recognized in OCI | 5 | (2) | 7 | 4
Commodity contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gains / (losses) reclassified from AOCI into earnings | 4 | (10) | 9 | (19)
Gains / (losses) recognized in OCI | (8) | (4) | 3 | (8)
Interest rate contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gains / (losses) reclassified from AOCI into earnings |  | (1) | (2) | (1)
Gains / (losses) recognized in OCI | $ (33) | $ 63 | $ (80) | $ 82

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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=7476318&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=7476318&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=7476318&loc=SL5624171-113959 + Details
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