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Derivative Instruments - Narrative (Details) $ in Millions | Jul. 31, 2025 USD ($) financial_institution | Jan. 31, 2025 USD ($)
--- | --- | ---
Derivative [Line Items] |  |
Net losses on cash flow hedges estimated to be reclassified into income within the next 12 months | $ 6 |
Number of financial institutions | financial_institution | 8 |
Net assets exposed | $ 1 | $ 86
Net liabilities exposed | 92 |
Non-designated hedges | Long |  |
Derivative [Line Items] |  |
Derivative, notional amount | 212 | 242
Non-designated hedges | Short |  |
Derivative [Line Items] |  |
Derivative, notional amount | 538 | 91
Cash flow hedges | Cash flow hedges | Long |  |
Derivative [Line Items] |  |
Derivative, notional amount | 3,000 | 2,800
Cash flow hedges | Cash flow hedges | Short |  |
Derivative [Line Items] |  |
Derivative, notional amount | $ 428 | $ 420
Cash flow hedges | Cash flow hedges | Maximum |  |
Derivative [Line Items] |  |
Derivative, remaining maturity (in months) | 55 months |

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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-7A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-15 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 + Details
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