Balance Sheet Components - Schedule of Computer Equipment, Software, Furniture, and Leasehold Improvements, Net (Details) - USD ($) $ in Millions	Jan. 31, 2026	Jan. 31, 2025
Property, Plant and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	$ 604	$ 578
Less: Accumulated depreciation	(483)	(461)
Computer equipment, software, furniture, and leasehold improvements, net	121	117
Computer hardware, at cost
Property, Plant and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	90	103
Computer software, at cost
Property, Plant and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	61	42
Furniture and equipment, at cost
Property, Plant and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	104	100
Leasehold improvements, land and buildings, at cost
Property, Plant and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	$ 349	$ 333