Income Taxes - Differences between the U.S. statutory rate and the aggregate income tax provision (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Income Tax Disclosure [Abstract]
Income tax provision at U.S. Federal statutory rate	$ 199	$ 119	$ 115
State income tax benefit, net of the U.S. Federal benefit	(3)	2	(43)
Foreign income taxed at rates different from the U.S. statutory rate	22	(25)	(11)
Valuation allowance adjustment	(38)	0	(637)
Tax effect of non-deductible stock-based compensation	34	32	25
Stock compensation (windfall) / shortfall	10	(43)	(35)
Research and development tax credit benefit	(12)	(19)	(16)
Closure of income tax audits and changes in uncertain tax positions	11	0	0
Tax effect of officer compensation in excess of $1.0 million	10	7	5
Non-deductible expenses	1	5	2
Global intangible low-taxed income, foreign derived intangible income	(106)	24	(65)
India withholding tax refund	0	(44)	0
Acquisition-related integrations	(2)	9	0
Other	(3)	1	(1)
Income tax provision (benefit)	123	$ 68	$ (661)
First $1M of officer compensation	$ 1