Derivative Instruments - Narrative (Details) - USD ($) $ in Millions	Apr. 30, 2026	Jan. 31, 2026
Derivatives, Fair Value [Line Items]
Net gain expected to be recognized in next 24 months	$ (7)
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, notional amount	2,270	$ 2,060
Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 450	$ 858