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Derivative Financial Instruments - Fair Values of Asset and Liability Derivative Financial Instruments (Details) - USD ($) $ in Millions	Oct. 31, 2015	Jan. 31, 2015	Nov. 01, 2014
Derivatives, Fair Value [Line Items]
Derivative financial instruments, assets	$ 84	$ 157	$ 98
Derivative financial instruments, liabilities	8	1	2
Foreign Exchange Forward Contract
Derivatives, Fair Value [Line Items]
Derivative financial instruments, assets	84	157	98
Derivative financial instruments, liabilities	8	1	2
Derivatives in cash flow hedging relationships | Foreign Exchange Forward Contract | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, assets	56	115	59
Derivatives in cash flow hedging relationships | Foreign Exchange Forward Contract | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, assets	12	23	23
Derivatives in cash flow hedging relationships | Foreign Exchange Forward Contract | Accrued Liabilities Current [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, liabilities	3	0	1
Derivatives in cash flow hedging relationships | Foreign Exchange Forward Contract | Lease Incentive And Other Long Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, liabilities	3	0	0
Derivatives in net investment hedging relationships | Foreign Exchange Forward Contract | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, assets	0	1	0
Derivatives in net investment hedging relationships | Foreign Exchange Forward Contract | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, assets	0	0	0
Derivatives in net investment hedging relationships | Foreign Exchange Forward Contract | Accrued Liabilities Current [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, liabilities	0	0	0
Derivatives in net investment hedging relationships | Foreign Exchange Forward Contract | Lease Incentive And Other Long Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, liabilities	0	0	0
Not Designated as Hedging Instrument | Foreign Exchange Forward Contract | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, assets	16	18	16
Not Designated as Hedging Instrument | Foreign Exchange Forward Contract | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, assets	0	0	0
Not Designated as Hedging Instrument | Foreign Exchange Forward Contract | Accrued Liabilities Current [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, liabilities	2	1	1
Not Designated as Hedging Instrument | Foreign Exchange Forward Contract | Lease Incentive And Other Long Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, liabilities	$ 0	$ 0	$ 0

X

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 20



-Section 50



-Paragraph 3



-Subparagraph (a)



-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 815



-SubTopic 10



-Section 50



-Paragraph 4B



-Subparagraph (a),(c)



-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 20



-Section 55



-Paragraph 7



-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 860



-SubTopic 20



-Section 50



-Paragraph 4D



-Subparagraph (c)(2)



-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719

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- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 860



-SubTopic 20



-Section 50



-Paragraph 4D



-Subparagraph (c)(2)



-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 20



-Section 50



-Paragraph 3



-Subparagraph (a)



-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 815



-SubTopic 10



-Section 50



-Paragraph 4B



-Subparagraph (a),(c)



-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 20



-Section 55



-Paragraph 7



-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313

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No definition available.

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