Taxes (Schedule of Income Tax Provision) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Current:
U.S. federal	$ 2,030	$ 3,313	$ 2,991
U.S. state and local	610	649	742
International	2,654	1,553	1,127
Total current tax provision	5,294	5,515	4,860
Deferred:
U.S. federal	608	(671)	2,316
U.S. state and local	119	41	23
International	(297)	(129)	(341)
Total deferred tax expense (benefit)	430	(759)	1,998
Total provision for income taxes	$ 5,724	$ 4,756	$ 6,858