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

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Gross amount of debt extinguished.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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-Publisher SEC

-Name Regulation S-X (SX)

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Amount remaining of a stock repurchase plan authorized.

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Financing Activities (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended							3 Months Ended		3 Months Ended		3 Months Ended
	Nov. 01, 2014	Nov. 01, 2014 5.75% Senior Notes due 2014 [Member]	Nov. 02, 2013 5.75% Senior Notes due 2014 [Member]	Nov. 01, 2014 7.625% Senior Debentures [Member]	Nov. 02, 2013 7.625% Senior Debentures [Member]	Nov. 02, 2013 4.375% Senior notes due 2023 [Member]	Nov. 01, 2014 3.625% senior notes due 2024[Member]	Jan. 31, 2015 Subsequent Event [Member]	Jan. 31, 2015 Subsequent Event [Member] 7.875% Senior Notes Due 2015 [Member]	Jan. 31, 2015 Subsequent Event [Member] 4.5% senior notes due 2034[Member]	Nov. 18, 2014 Subsequent Event [Member] 4.5% senior notes due 2034[Member]	Jan. 31, 2015 Minimum [Member] Subsequent Event [Member]	Jan. 31, 2015 Maximum [Member] Subsequent Event [Member]
Extinguishment of debt		$ 453	$ 0	$ 0	$ 109			$ 407
Stock Repurchased During Period, Shares	25.3
Stock Repurchased During Period, Value	1,483
Stock Repurchase Program, Remaining Authorized Repurchase Amount	1,449
Debt Instrument, Face Amount						400	500			550
Debt Instrument, Interest Rate, Stated Percentage		5.75%				4.375%	3.625%		7.875%		4.50%
Gains (Losses) on Extinguishment of Debt												$ 16	$ 18