Income Taxes (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]
Income tax provision	$ 76	$ 36	$ 111	$ 52

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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+ Details