Leases and Other Commitments - Components of Lease Expense and Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 684	$ 1,041	$ 986
Finance lease cost:
Amortization of right-of-use assets	303	264	198
Interest on lease liabilities	28	29	10
Total finance lease cost	331	293	208
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows for operating leases	628	716	769
Operating cash outflows for finance leases	27	29	10
Financing cash outflows for finance leases	380	347	180
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 345	$ 456	$ 915