Segment Reporting Information by Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
Feb. 15, 2015	Feb. 16, 2014	Feb. 15, 2015	Feb. 16, 2014	Aug. 31, 2014
Segment Reporting Information [Line Items]
Total revenue	$ 27,454us-gaap_Revenues	$ 26,306us-gaap_Revenues	$ 54,320us-gaap_Revenues	$ 51,323us-gaap_Revenues	$ 112,640us-gaap_Revenues
Operating income	877us-gaap_OperatingIncomeLoss	724us-gaap_OperatingIncomeLoss	1,647us-gaap_OperatingIncomeLoss	1,392us-gaap_OperatingIncomeLoss	3,220us-gaap_OperatingIncomeLoss
Depreciation and amortization	260	240	514	471	1,029
Additions to property and equipment	612	447	1,167	1,021	1,993
Net property and equipment	14,872us-gaap_PropertyPlantAndEquipmentNet	14,348us-gaap_PropertyPlantAndEquipmentNet	14,872us-gaap_PropertyPlantAndEquipmentNet	14,348us-gaap_PropertyPlantAndEquipmentNet	14,830us-gaap_PropertyPlantAndEquipmentNet
Total assets	33,600us-gaap_Assets	31,566us-gaap_Assets	33,600us-gaap_Assets	31,566us-gaap_Assets	33,024us-gaap_Assets
Operating Segments [Member] \| United States Operations
Segment Reporting Information [Line Items]
Total revenue	19,879	18,859	39,060	36,583	80,477
Operating income	556	424	989	788	1,880
Depreciation and amortization	193	174	381	344	755
Additions to property and equipment	327	228	763	613	1,245
Net property and equipment	10,403	9,891	10,403	9,891	10,132
Total assets	23,598	21,479	23,598	21,479	21,929
Operating Segments [Member] \| Canadian Operations
Segment Reporting Information [Line Items]
Total revenue	4,001	4,056	8,232	8,180	17,943
Operating income	178	161	374	350	796
Depreciation and amortization	30	31	58	59	124
Additions to property and equipment	32	51	78	118	204
Net property and equipment	1,457	1,612	1,457	1,612	1,662
Total assets	3,858	4,429	3,858	4,429	4,892
Operating Segments [Member] \| Other International Operations
Segment Reporting Information [Line Items]
Total revenue	3,574	3,391	7,028	6,560	14,220
Operating income	143	139	284	254	544
Depreciation and amortization	37	35	75	68	150
Additions to property and equipment	253	168	326	290	544
Net property and equipment	3,012	2,845	3,012	2,845	3,036
Total assets	$ 6,144	$ 5,658	$ 6,144	$ 5,658	$ 6,203

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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