Deferred Commissions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Revenue from Contract with Customer [Abstract]
Sales commissions capitalized as contract costs	$ 48	$ 33	$ 80	$ 59
Amortization of contract costs	$ 40	$ 32	$ 76	$ 62