Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Total Walmart Shareholders' Equity	Nonredeemable Noncontrolling Interest
Beginning balance (in shares) at Jan. 31, 2021		2,821
Beginning balance at Jan. 31, 2021	$ 87,531	$ 282	$ 3,646	$ 88,763	$ (11,766)	$ 80,925	$ 6,606
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	2,811			2,730		2,730	81
Other comprehensive income (loss), net of income taxes	3,746				3,820	3,820	(74)
Dividends	(6,200)			(6,200)		(6,200)
Purchase of Company stock (in shares)		(21)
Purchase of Company stock	(2,832)	$ (2)	(112)	(2,718)		(2,832)
Dividends to noncontrolling interest	(408)						(408)
Sale of subsidiary stock	75		18			18	57
Other (in shares)		5
Other	(131)		(128)	2		(126)	(5)
Ending balance (in shares) at Apr. 30, 2021		2,805
Ending balance at Apr. 30, 2021	84,592	$ 280	3,424	82,577	(7,946)	78,335	6,257
Beginning balance (in shares) at Jan. 31, 2021		2,821
Beginning balance at Jan. 31, 2021	87,531	$ 282	3,646	88,763	(11,766)	80,925	6,606
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	10,307
Other comprehensive income (loss), net of income taxes	3,089
Ending balance (in shares) at Oct. 31, 2021		2,778
Ending balance at Oct. 31, 2021	90,757	$ 277	4,811	85,674	(8,488)	82,274	8,483
Beginning balance (in shares) at Apr. 30, 2021		2,805
Beginning balance at Apr. 30, 2021	84,592	$ 280	3,424	82,577	(7,946)	78,335	6,257
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	4,364			4,276		4,276	88
Other comprehensive income (loss), net of income taxes	48				(30)	(30)	78
Purchase of Company stock (in shares)		(17)
Purchase of Company stock	(2,369)	$ (2)	(94)	(2,273)		(2,369)
Dividends to noncontrolling interest	(10)						(10)
Sale of subsidiary stock	177		6			6	171
Other (in shares)		3
Other	325		319	(8)		311	14
Ending balance (in shares) at Jul. 31, 2021		2,791
Ending balance at Jul. 31, 2021	87,127	$ 278	3,655	84,572	(7,976)	80,529	6,598
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	3,132			3,105		3,105	27
Other comprehensive income (loss), net of income taxes	(705)				(512)	(512)	(193)
Dividends	45			45		45
Purchase of Company stock (in shares)		(14)
Purchase of Company stock	(2,132)	$ (1)	(87)	(2,044)		(2,132)
Dividends to noncontrolling interest	(6)						(6)
Sale of subsidiary stock	2,979		922			922	2,057
Other (in shares)		1
Other	317		321	(4)		317
Ending balance (in shares) at Oct. 31, 2021		2,778
Ending balance at Oct. 31, 2021	90,757	$ 277	4,811	85,674	(8,488)	82,274	8,483
Beginning balance (in shares) at Jan. 31, 2022		2,761
Beginning balance at Jan. 31, 2022	91,891	$ 276	4,839	86,904	(8,766)	83,253	8,638
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	2,103			2,054		2,054	49
Other comprehensive income (loss), net of income taxes	275				268	268	7
Dividends	(6,173)			(6,173)		(6,173)
Purchase of Company stock (in shares)		(17)
Purchase of Company stock	(2,376)	$ (2)	(125)	(2,249)		(2,376)
Sale of subsidiary stock	35		24			24	11
Other (in shares)		4
Other	(155)	$ 1	(151)	(4)		(154)	(1)
Ending balance (in shares) at Apr. 30, 2022		2,748
Ending balance at Apr. 30, 2022	85,600	$ 275	4,587	80,532	(8,498)	76,896	8,704
Beginning balance (in shares) at Jan. 31, 2022		2,761
Beginning balance at Jan. 31, 2022	91,891	$ 276	4,839	86,904	(8,766)	83,253	8,638
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	5,483
Other comprehensive income (loss), net of income taxes	(2,490)
Ending balance (in shares) at Oct. 31, 2022		2,701
Ending balance at Oct. 31, 2022	80,123	$ 270	4,817	77,946	(10,780)	72,253	7,870
Beginning balance (in shares) at Apr. 30, 2022		2,748
Beginning balance at Apr. 30, 2022	85,600	$ 275	4,587	80,532	(8,498)	76,896	8,704
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	5,147			5,149		5,149	(2)
Other comprehensive income (loss), net of income taxes	(1,671)				(1,396)	(1,396)	(275)
Purchase of Company stock (in shares)		(26)
Purchase of Company stock	(3,386)	$ (3)	(182)	(3,201)		(3,386)
Dividends to noncontrolling interest	(434)						(434)
Sale of subsidiary stock	10		8			8	2
Other	321		259	39		298	23
Ending balance (in shares) at Jul. 31, 2022		2,722
Ending balance at Jul. 31, 2022	85,587	$ 272	4,672	82,519	(9,894)	77,569	8,018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	(1,767)			(1,798)		(1,798)	31
Other comprehensive income (loss), net of income taxes	(1,094)				(886)	(886)	(208)
Dividends	43			43		43
Purchase of Company stock (in shares)		(22)
Purchase of Company stock	(2,932)	$ (2)	(158)	(2,772)		(2,932)
Dividends to noncontrolling interest	(10)						(10)
Sale of subsidiary stock	10		7			7	3
Other (in shares)		1
Other	286		296	(46)		250	36
Ending balance (in shares) at Oct. 31, 2022		2,701
Ending balance at Oct. 31, 2022	$ 80,123	$ 270	$ 4,817	$ 77,946	$ (10,780)	$ 72,253	$ 7,870