Income Taxes - Provisions For (Benefit From) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Current:
Federal	$ 1,284	$ 940	$ 173
State	245	199	216
Foreign	925	417	397
Total	2,454	1,556	786
Deferred:
Federal	(982)	(640)	(134)
State	(167)	(182)	(203)
Foreign	(64)	80	3
Total	(1,213)	(742)	(334)
Provision for (benefit from) income taxes	$ 1,241	$ 814	$ 452