Income Tax (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 70	$ 36	$ 127	$ 96
Pre-tax income	352	$ 258	661	$ 479
Unrecognized tax benefits	271		271
Amount of gross unrecognized tax benefits that would impact the effective tax rate, if recognized	228		228
Unrecognized tax benefits that would reduce valuation allowance if recognized	43		43
Decrease in unrecognized tax benefits in the next twelve months for statute lapse	$ 0		$ 0