Income Tax (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 143	$ 70	$ 225	$ 127
Pre-tax income	$ 456	$ 352	$ 690	$ 661