Deferred Commissions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Revenue from Contract with Customer [Abstract]
Sales commissions capitalized as contract costs	$ 58	$ 37	$ 138	$ 97
Amortization of contract costs	$ 41	$ 33	$ 117	$ 95