Income Tax (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 76	$ 79	$ 203	$ 175
Pre-tax income	351	$ 320	1,012	$ 799
Unrecognized tax benefits	277		277
Amount of gross unrecognized tax benefits that would impact the effective tax rate, if recognized	234		234
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