Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 2,103	$ 2,811
Consolidated net income attributable to noncontrolling interest	(49)	(81)
Consolidated net income attributable to Walmart	2,054	2,730
Other comprehensive income (loss), net of income taxes
Currency translation and other	232	2,959
Net investment hedges	0	(1,202)
Cash flow hedges	42	20
Minimum pension liability	1	1,969
Other comprehensive income (loss), net of income taxes	275	3,746
Other comprehensive (income) loss attributable to noncontrolling interest	(7)	74
Other comprehensive income (loss) attributable to Walmart	268	3,820
Comprehensive income, net of income taxes	2,378	6,557
Comprehensive income attributable to noncontrolling interest	(56)	(7)
Comprehensive income attributable to Walmart	$ 2,322	$ 6,550