Derivative Instruments - Narrative (Details) - USD ($) $ in Millions	Jul. 31, 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	2,300	$ 2,060
Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 126	$ 858