Derivative Instruments - Narrative (Details) $ in Millions	Jul. 31, 2026 USD ($) financial_institution	Jan. 31, 2026 USD ($)
Derivative [Line Items]
Net gains (loss) on cash flow hedges estimated to be reclassified into income within the next 12 months	$ (40)
Number of financial institutions \| financial_institution	9
Foreign currency forward contracts in asset position	$ 12	$ 1
Foreign currency forward contracts in liability position	62	128
Non-designated hedges \| Long
Derivative [Line Items]
Derivative, notional amount	445	442
Non-designated hedges \| Short
Derivative [Line Items]
Derivative, notional amount	656	565
Cash flow hedges \| Cash flow hedges \| Long
Derivative [Line Items]
Derivative, notional amount	3,300	3,000
Cash flow hedges \| Cash flow hedges \| Short
Derivative [Line Items]
Derivative, notional amount	$ 812	$ 874
Cash flow hedges \| Cash flow hedges \| Maximum
Derivative [Line Items]
Derivative, remaining maturity	42 months

Fair value, after effect of master netting arrangement and deduction of obligation to return financial collateral not offset and financial instrument subject to master netting arrangement not offset, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Includes derivative not subject to master netting arrangement or similar agreement.

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- Definition

Fair value, after effect of master netting arrangement and deduction of obligation to return financial collateral not offset and financial instrument subject to master netting arrangement not offset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Includes derivative not subject to master netting arrangement or similar agreement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Nominal or face amount used to calculate payment on derivative.

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- Definition

Period remaining until maturity of derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

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- Definition

Number Of Financial Institutions

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No definition available.

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