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Effects of Cash Flow Hedges (Detail) (Cash Flow Hedges, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gains / (losses) reclassified from AOCI into earnings	$ 1	$ (17)
Gains / (losses) recognized in OCI	(34)	21
Foreign exchange contracts | Forecasted transactions
Derivative Instruments, Gain (Loss) [Line Items]
Gains / (losses) reclassified from AOCI into earnings	(2)	(8)
Gains / (losses) recognized in OCI	2	6
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains / (losses) reclassified from AOCI into earnings	5	(9)
Gains / (losses) recognized in OCI	11	(4)
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains / (losses) reclassified from AOCI into earnings	(2)
Gains / (losses) recognized in OCI	$ (47)	$ 19

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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

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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

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