Computer Equipment, Software, Furniture, and Leasehold Improvements, Net (Details) - USD ($) $ in Millions	Oct. 31, 2023	Jan. 31, 2023
Property, Plant and Equipment [Line Items]
Computer equipment, software, furniture, and leasehold improvements, gross	$ 617	$ 632
Less: Accumulated depreciation	(489)	(488)
Computer equipment, software, furniture, and leasehold improvements, net	128	144
Computer hardware, at cost
Property, Plant and Equipment [Line Items]
Computer equipment, software, furniture, and leasehold improvements, gross	115	126
Computer software, at cost
Property, Plant and Equipment [Line Items]
Computer equipment, software, furniture, and leasehold improvements, gross	48	49
Furniture and equipment, at cost
Property, Plant and Equipment [Line Items]
Computer equipment, software, furniture, and leasehold improvements, gross	98	94
Leasehold improvements, land and buildings, at cost
Property, Plant and Equipment [Line Items]
Computer equipment, software, furniture, and leasehold improvements, gross	$ 356	$ 363