Balance Sheet Components - Schedule of Computer Equipment, Software, Furniture, and Leasehold Improvements, Net (Details) - USD ($) $ in Millions	Jul. 31, 2026	Jan. 31, 2026
Property, Plant, and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	$ 590	$ 604
Less: Accumulated depreciation	(466)	(483)
Computer equipment, software, furniture, and leasehold improvements, net	124	121
Computer hardware, at cost
Property, Plant, and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	93	90
Computer software, at cost
Property, Plant, and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	81	61
Furniture and equipment, at cost
Property, Plant, and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	98	104
Leasehold improvements, land and buildings, at cost
Property, Plant, and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	$ 318	$ 349