Condensed Consolidated Statements Of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Revenues:
Net sales	$ 113,204	$ 109,516	$ 339,010	$ 321,569
Membership and other Income	725	710	2,233	2,212
Total revenues	113,929	110,226	341,243	323,781
Costs and expenses:
Cost of sales	85,517	82,591	256,360	242,538
Operating, selling, general and administrative expenses	22,296	21,757	65,682	63,086
Operating income	6,116	5,878	19,201	18,157
Interest:
Debt	522	528	1,512	1,544
Capital leases	68	72	206	218
Interest income	(43)	(65)	(131)	(131)
Interest, net	547	535	1,587	1,631
Income from continuing operations before income taxes	5,569	5,343	17,614	16,526
Provision for income taxes	1,744	1,842	5,734	5,510
Income from continuing operations	3,825	3,501	11,880	11,016
Loss from discontinued operations, net of income taxes	0	(8)	0	(36)
Consolidated net income	3,825	3,493	11,880	10,980
Less consolidated net income attributable to noncontrolling interest	(190)	(157)	(487)	(444)
Consolidated net income attributable to Walmart	$ 3,635	$ 3,336	$ 11,393	$ 10,536
Basic net income per common share:
Basic income per common share from continuing operations attributable to Walmart	$ 1.08	$ 0.97	$ 3.37	$ 3.04
Basic loss per common share from discontinued operations attributable to Walmart	$ 0.00	$ 0.00	$ 0.00	$ (0.01)
Basic net income per common share attributable to Walmart	$ 1.08	$ 0.97	$ 3.37	$ 3.03
Diluted net income per common share:
Diluted income per common share from continuing operations attributable to Walmart	$ 1.08	$ 0.97	$ 3.35	$ 3.03
Diluted loss per common share from discontinued operations attributable to Walmart	$ 0.00	$ (0.01)	$ 0.00	$ (0.01)
Diluted net income per common share attributable to Walmart	$ 1.08	$ 0.96	$ 3.35	$ 3.02
Weighted-average common shares outstanding:
Basic	3,364	3,445	3,385	3,473
Diluted	3,379	3,458	3,400	3,487
Dividends declared per common share	$ 0.00	$ 0.00	$ 1.59	$ 1.46