Income Tax (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
Income Tax Disclosure [Abstract]
Provision for income tax expense (benefit)	$ 36	$ 46	$ 96	$ 95
(Loss) income before income taxes	258	$ 232	479	$ 427
Unrecognized tax benefits	220		220
Amount of gross unrecognized tax benefits that would impact the effective tax rate, if recognized	181		181
Unrecognized tax benefits that would reduce valuation allowance if recognized	38		38
Decrease in unrecognized tax benefits in the next twelve months for statute lapse	$ 2		$ 2