Business and Summary of Significant Accounting Policies - Computer Equipment, Software, Furniture and Leasehold Improvements, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Property, Plant and Equipment [Abstract]
Useful life	3 years
Depreciation	$ 50	$ 52	$ 51
Tangible asset impairment charges	0	29	0
Computer software, hardware, leasehold improvements, furniture, and equipment, at cost	632	636
Less: Accumulated depreciation	(488)	(474)
Computer software, hardware, leasehold improvements, furniture, and equipment, net	144	162
Capitalized software development costs	190	128
Amortization	24	12	$ 4
Cloud-based Software Hosting Arrangements
Property, Plant and Equipment [Abstract]
Accumulated amortization	41	17
Computer hardware, at cost
Property, Plant and Equipment [Abstract]
Computer software, hardware, leasehold improvements, furniture, and equipment, at cost	126	137
Computer software, at cost
Property, Plant and Equipment [Abstract]
Computer software, hardware, leasehold improvements, furniture, and equipment, at cost	49	55
Leasehold improvements, land and buildings, at cost
Property, Plant and Equipment [Abstract]
Computer software, hardware, leasehold improvements, furniture, and equipment, at cost	363	351
Furniture and equipment, at cost
Property, Plant and Equipment [Abstract]
Computer software, hardware, leasehold improvements, furniture, and equipment, at cost	$ 94	$ 93
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