Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 13,940	$ 13,706	$ 15,201
Consolidated net income attributable to noncontrolling interest	(267)	(196)	(320)
Consolidated net income attributable to Walmart	13,673	13,510	14,881
Other comprehensive income (loss), net of income taxes
Currency translation and other	2,442	842	286
Net investment hedges	(1,202)	(221)	122
Cash flow hedges	(444)	235	(399)
Minimum pension liability	1,974	(30)	(1,244)
Other comprehensive income (loss), net of income taxes	2,770	826	(1,235)
Other comprehensive (income) loss attributable to noncontrolling interest	230	213	(28)
Other comprehensive income (loss) attributable to Walmart	3,000	1,039	(1,263)
Comprehensive income, net of income taxes	16,710	14,532	13,966
Comprehensive (income) loss attributable to noncontrolling interest	(37)	17	(348)
Comprehensive income attributable to Walmart	$ 16,673	$ 14,549	$ 13,618