Property and Equipment, Net and Other Balance Sheet Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 6,918	$ 6,841
Less accumulated depreciation and amortization	(3,682)	(3,152)
Property and equipment, net	3,236	3,689
Depreciation amortization expense	1,000	1,100	$ 903
Accrued compensation	2,800	2,500
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	293	293
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	492	490
Computers, equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,345	4,209
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	232	245
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,556	$ 1,604