Segment Reporting Information by Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	May 12, 2013	May 06, 2012	May 12, 2013	May 06, 2012	Sep. 02, 2012
Segment Reporting Information [Line Items]
Total revenue	$ 24,083	$ 22,324	$ 72,669	$ 66,919	$ 99,137
Operating income	722	623	2,099	1,810	2,759
Depreciation and amortization	221	202	651	616	908
Additions to property and equipment	436	268	1,379	900	1,480
Net property and equipment	13,546	12,596	13,546	12,596	12,961
Total assets	30,006	27,836	30,006	27,836	27,140
United States Operations
Segment Reporting Information [Line Items]
Total revenue	17,444	16,203	52,156	48,428	71,776
Operating income	452	356	1,248	1,046	1,632
Depreciation and amortization	163	150	478	460	667
Additions to property and equipment	194	196	704	628	1,012
Net property and equipment	9,456	9,012	9,456	9,012	9,236
Total assets	20,518	19,121	20,518	19,121	18,401
Canadian Operations
Segment Reporting Information [Line Items]
Total revenue	3,857	3,474	11,748	10,477	15,717
Operating income	172	157	504	436	668
Depreciation and amortization	29	25	85	79	117
Additions to property and equipment	30	23	122	110	170
Net property and equipment	1,655	1,631	1,655	1,631	1,664
Total assets	4,578	4,065	4,578	4,065	4,237
Other International Operations
Segment Reporting Information [Line Items]
Total revenue	2,782	2,647	8,765	8,014	11,644
Operating income	98	110	347	328	459
Depreciation and amortization	29	27	88	77	124
Additions to property and equipment	212	49	553	162	298
Net property and equipment	2,435	1,953	2,435	1,953	2,061
Total assets	$ 4,910	$ 4,650	$ 4,910	$ 4,650	$ 4,502