Income Tax (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2023	Apr. 30, 2022
Income Tax Disclosure [Abstract]
Provision for income tax expense (benefit)	$ 60	$ 49
(Loss) income before income taxes	221	$ 195
Unrecognized tax benefits	227
Amount of gross unrecognized tax benefits that would impact the effective tax rate, if recognized	189
Unrecognized tax benefits that would reduce valuation allowance if recognized	38
Decrease in unrecognized tax benefits in the next twelve months for statute lapse	$ 4