Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 30, 2026	Apr. 30, 2025
Effective Income Tax Rate Reconciliation [Line Items]
Provision for income taxes	$ 4	$ 6
Pretax income (loss)	$ 78	$ 68
Effective income tax rate	4.60%
Netting
Effective Income Tax Rate Reconciliation [Line Items]
Effective income tax rate		8.50%

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details

- Definition

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

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+ Details