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	2,811			2,730		2,730	81
Other comprehensive income (loss), net of income taxes	3,746				3,820	3,820	(74)
Dividends declared	(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 declared to noncontrolling interests	(408)						(408)
Sale of subsidiary stock	75		18	0		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, 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	2,103			2,054		2,054	49
Other comprehensive income (loss), net of income taxes	275				268	268	7
Dividends declared	(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