Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Federal:
Current	$ 219	$ (1)	$ 10
Deferred	(222)	(5)	(740)
State:
Current	28	2	19
Deferred	(19)	1	(58)
Foreign:
Current	151	83	88
Deferred	(34)	(12)	20
Income tax provision (benefit)	$ 123	$ 68	$ (661)