Debt - Schedule of Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Debt Disclosure [Abstract]
Contractual interest expense	$ 198	$ 96	$ 106
Amortization of debt discounts and debt issuance costs	18	14	4
Debt interest expense	$ 216	$ 110	$ 110