Derivative Instruments - Narrative (Details) - USD ($) $ in Millions	Jul. 31, 2025	Jan. 31, 2025
Derivatives, Fair Value [Line Items]
Net gain expected to be recognized in next 24 months	$ (5)
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, notional amount	1,970	$ 1,520
Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 277	$ 1,140