Leases and Other Commitments - Balance Sheet and Other Information Related to Leases (Details) - USD ($) $ in Millions	Jan. 31, 2025	Jan. 31, 2024
Operating leases:
Operating lease right-of-use assets	$ 2,157	$ 2,366
Operating lease liabilities, current	579	518
Noncurrent operating lease liabilities	2,380	2,644
Total operating lease liabilities	2,959	3,162
Finance leases:
Accumulated depreciation	$ (708)	$ (525)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and equipment, net	Property and equipment, net
Property and equipment, net	$ 812	$ 1,054
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accounts Payable and Other Accrued Liabilities, Current	Accounts Payable and Other Accrued Liabilities, Current
Accrued expenses and other liabilities	$ 337	$ 372
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other noncurrent liabilities	Other noncurrent liabilities
Other noncurrent liabilities	$ 341	$ 602
Total finance lease liabilities	$ 678	$ 974
Weighted average remaining lease term
Operating leases	7 years	7 years
Finance leases	3 years	3 years
Weighted average discount rate
Operating leases	3.20%	2.90%
Finance leases	3.80%	3.30%
Computers, equipment and software
Finance leases:
Computers, equipment and software	$ 1,520	$ 1,579