Debt - Components of Long Term Debt (Details) (USD $) In Millions, unless otherwise specified	Nov. 01, 2014	Feb. 01, 2014	Nov. 02, 2013
Debt Instrument [Line Items]
Unamortized debt discount	$ (7)	$ (8)	$ (8)
Long-term debt	2,793	2,792	2,792
Senior Notes
Debt Instrument [Line Items]
Effective Rate	5.54%	5.54%
Total senior debt	2,800	2,800	2,800
Senior Notes \| Four Point Seven Five Percent Senior Note Due Twenty Twenty Three [Member] [Domain] [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.75%
Senior Notes \| Senior Notes Due 2017
Debt Instrument [Line Items]
Effective Rate	6.31%	6.31%
Debt Instrument, Interest Rate, Stated Percentage	6.25%	6.25%
Total senior debt	650	650	650
Senior Notes \| Senior Notes Due 2021
Debt Instrument [Line Items]
Effective Rate	4.81%	4.81%
Debt Instrument, Interest Rate, Stated Percentage	4.00%	4.00%
Total senior debt	650	650	650
Senior Notes \| Senior Notes Due 2023
Debt Instrument [Line Items]
Effective Rate	3.25%	3.25%
Debt Instrument, Interest Rate, Stated Percentage	3.25%	3.25%
Total senior debt	350	350	350
Senior Notes \| Four Point Seven Eight Percent Senior Note Due Twenty Twenty Three [Member] [Domain]
Debt Instrument [Line Items]
Effective Rate	4.78%	4.78%
Total senior debt	300		300
Senior Notes \| Senior Notes Due 2029
Debt Instrument [Line Items]
Effective Rate	7.36%	7.36%
Debt Instrument, Interest Rate, Stated Percentage	7.25%	7.25%
Total senior debt	200	200	200
Senior Notes \| Senior Notes Due 2033
Debt Instrument [Line Items]
Effective Rate	6.05%	6.05%
Debt Instrument, Interest Rate, Stated Percentage	6.00%	6.00%
Total senior debt	300	300	300
Senior Notes \| Senior Notes Due 2037
Debt Instrument [Line Items]
Effective Rate	6.89%	6.89%
Debt Instrument, Interest Rate, Stated Percentage	6.88%	6.88%
Total senior debt	$ 350	$ 350	$ 350
Four Point Seven Eight Percent Senior Note Due Twenty Twenty Three [Member] [Domain] \| Senior Notes Due Twenty Twenty Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.75%

Contractual interest rate for funds borrowed, under the debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

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-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

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- Definition

Weighted average interest rate of long-term debt outstanding.

+ References

No definition available.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

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