Income Tax (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 125	$ 76	$ 350	$ 203
Pre-tax income	$ 468	$ 351	$ 1,158	$ 1,012