Derivatives and Hedging Activities (Offsetting of Derivative Assets and Derivative Liabilities) (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset | $ 157 | $ 104 | |||||||||
| Derivative Liability | 187 | 303 | |||||||||
| Total gross amounts of netting adjustments and cash collateral | [1],[2] | 230 | 230 | ||||||||
| Net adjustment and cash collateral | [1],[2] | (185) | [3] | (299) | |||||||
| Derivative assets | 387 | 334 | |||||||||
| Derivative liabilities (1) | 2 | 4 | |||||||||
| Derivative, Collateral, Obligation to Return Securities | 5 | 0 | |||||||||
| Derivative, Collateral, Right to Reclaim Securities | 0 | 0 | |||||||||
| Derivative Asset, Fair Value, Amount Offset Against Collateral | [4] | 382 | 334 | ||||||||
| Derivative Liability, Fair Value, Amount Offset Against Collateral | [4] | 2 | 4 | ||||||||
| Additional net credit exposure due to non-cash collateral pledged to counterparties in excess of the net derivative portion. | 20 | 0 | |||||||||
| Non-cash collateral pledged by the individual counterparty, in excess of the total derivative position | 15 | 0 | |||||||||
| Uncleared derivatives [Member] | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset | 129 | 81 | |||||||||
| Derivative Liability | 182 | 297 | |||||||||
| Total gross amounts of netting adjustments and cash collateral | (118) | (73) | |||||||||
| Net adjustment and cash collateral | (180) | (293) | |||||||||
| Derivative assets | 11 | 8 | |||||||||
| Derivative liabilities (1) | 2 | 4 | |||||||||
| Derivative, Collateral, Obligation to Return Securities | 5 | 0 | |||||||||
| Derivative, Collateral, Right to Reclaim Securities | 0 | 0 | |||||||||
| Derivative Asset, Fair Value, Amount Offset Against Collateral | 6 | 8 | |||||||||
| Derivative Liability, Fair Value, Amount Offset Against Collateral | 2 | 4 | |||||||||
| Cleared derivatives [Member] | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset | 28 | 23 | |||||||||
| Derivative Liability | 5 | 6 | |||||||||
| Total gross amounts of netting adjustments and cash collateral | 348 | 303 | |||||||||
| Net adjustment and cash collateral | (5) | (6) | |||||||||
| Derivative assets | 376 | 326 | |||||||||
| Derivative liabilities (1) | 0 | 0 | |||||||||
| Derivative, Collateral, Obligation to Return Securities | 0 | 0 | |||||||||
| Derivative, Collateral, Right to Reclaim Securities | 0 | 0 | |||||||||
| Derivative Asset, Fair Value, Amount Offset Against Collateral | 376 | 326 | |||||||||
| Derivative Liability, Fair Value, Amount Offset Against Collateral | $ 0 | $ 0 | |||||||||
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- Definition Additional net credit exposure due to non-cash collateral pledged to counterparties in excess of the net derivative portion. No definition available.
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- Definition Non-cash collateral pledged by the individual counterparty, in excess of the total derivative position. No definition available.
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- Definition Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, and obligation to return cash collateral under master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of obligation to return securities collateral under master netting arrangements that have not been offset against derivative assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of right to receive securities collateral under master netting arrangements that have not been offset against derivative liabilities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, and right to receive cash collateral under master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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