Segment Reporting (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 03, 2013	Jul. 28, 2012	Aug. 03, 2013 segment	Jul. 28, 2012	Feb. 02, 2013 segment
Segment Reporting
Number of business segments			2		3
Segment Reporting Information
Sales	$ 17,117	$ 16,451	$ 33,823	$ 32,989
Cost of sales	11,745	11,297	23,308	22,838
Selling, general and administrative expenses	3,698	3,588	7,287	6,981
Depreciation and amortization	542	531	1,079	1,060
Segment profit	1,161	1,255	2,194	2,539
Gain on receivables transaction			391
Reduction of beneficial interest asset	(29)		(45)
Earnings before interest expense and income taxes	1,132	1,255	2,540	2,539
Net interest expense	171	184	801	366
Earnings before income taxes	961	1,071	1,739	2,173
U.S.
Segment Reporting Information
Sales	16,841	16,451	33,462	32,989
Cost of sales	11,556	11,297	23,067	22,838
Depreciation and amortization	493	508	984	1,016
Segment profit	1,330	1,324	2,569	2,664
Canadian
Segment Reporting Information
Sales	275		361
Cost of sales	188		241
Depreciation and amortization	49	22	94	44
Segment profit	(169)	(69)	(374)	(125)
Business segments
Segment Reporting Information
Selling, general and administrative expenses	3,669	3,368	7,242	6,552
Business segments | U.S.
Segment Reporting Information
Selling, general and administrative expenses	3,462	3,322	6,842	6,471
Business segments | Canadian
Segment Reporting Information
Selling, general and administrative expenses	$ 207	$ 47	$ 400	$ 81