Business and Summary of Significant Accounting Policies - Computer Equipment, Software, Furniture and Leasehold Improvements, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Property, Plant and Equipment [Abstract]
Useful life	3 years
Depreciation	$ 47	$ 50	$ 52
Tangible asset impairment charges	0	0	29
Computer equipment, software, furniture, and leasehold improvements, gross	622	632
Less: Accumulated depreciation	(501)	(488)
Computer equipment, software, furniture, and leasehold improvements, net	121	144
Amortization	42	24	$ 12
Cloud-based Software Hosting Arrangements
Property, Plant and Equipment [Abstract]
Capitalized software development costs	254	190
Accumulated amortization	83	41
Computer hardware, at cost
Property, Plant and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	117	126
Computer software, at cost
Property, Plant and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	48	49
Furniture and equipment, at cost
Property, Plant and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	100	94
Leasehold improvements, land and buildings, at cost
Property, Plant and Equipment [Abstract]
Computer equipment, software, furniture, and leasehold improvements, gross	$ 357	$ 363
Software and Software Development Costs
Property, Plant and Equipment [Abstract]
Useful life	2 years
Minimum
Property, Plant and Equipment [Abstract]
Useful life	3 years
Maximum
Property, Plant and Equipment [Abstract]
Useful life	5 years