Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

Gain (loss) on hedging derivative instrument or the foreign currency transaction gain (loss) on the nonderivative hedging instrument designated as a hedge of a net investment in foreign operations related to hedge ineffectiveness, which is included in earnings in the 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 (d)(1)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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- Definition

Amount as of the balance sheet date of the unamortized adjustment to the carrying value of an interest-bearing hedged item made under an effective interest rate fair value hedge that is amortized upon discontinuation of the interest rate fair value hedge.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 35

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=6439857&loc=d3e75592-113984

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or 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 (e)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959

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-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

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-Paragraph 1A

-Subparagraph (d)

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Derivative Financial Instruments (Details)	3 Months Ended		6 Months Ended
Derivative Financial Instruments (Details)	Aug. 01, 2015 USD ($) swap	Aug. 02, 2014 USD ($) swap	Aug. 01, 2015 USD ($) swap	Aug. 02, 2014 USD ($) swap	Jan. 31, 2015 USD ($)
Derivative Contracts - Types, Statements of Financial Position Classification and Fair Values
Amount of ineffectiveness recognized	$ 0	$ 0	$ 0	$ 0
Derivative Contracts - Effect on Results of Operations
Unamortized hedged debt valuation gains from terminated and de-designated interest rate swaps	25,000,000	43,000,000	25,000,000	43,000,000	$ 34,000,000
Interest rate swaps
Derivative Contracts - Types, Statements of Financial Position Classification and Fair Values
Derivative, notional amount	1,250,000,000	1,250,000,000	1,250,000,000	1,250,000,000
Derivative Contracts - Effect on Results of Operations
Net interest expense	$ (9,000,000)	$ (9,000,000)	$ (18,000,000)	$ (13,000,000)
Designated as Hedging Instrument
Derivative Contracts - Types, Statements of Financial Position Classification and Fair Values
Number of interest rate swaps \| swap	3	3	3	3