Leases - Schedule of Other Information Relating to Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Leases [Abstract]
Operating cash flows from operating leases	$ 2,390	$ 2,273	$ 2,280
Operating cash flows from finance leases	375	315	248
Financing cash flows from finance leases	908	1,055	563
Assets obtained in exchange for operating lease obligations	1,974	1,514	1,714
Assets obtained in exchange for finance lease obligations	$ 1,455	$ 1,572	$ 1,226
Weighted-average remaining lease term - operating leases	11 years 3 months 18 days	11 years 8 months 12 days
Weighted-average remaining lease term - finance leases	11 years 8 months 12 days	12 years 4 months 24 days
Weighted-average discount rate - operating leases	6.50%	6.40%
Weighted-average discount rate - finance leases	6.70%	6.80%