Income Tax (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 57	$ 60
Pre-tax income	309	$ 221
Unrecognized tax benefits	267
Amount of gross unrecognized tax benefits that would impact the effective tax rate, if recognized	224
Unrecognized tax benefits that would reduce valuation allowance if recognized	43
Decrease in unrecognized tax benefits in the next twelve months for statute lapse	$ 0