Derivative Instruments - Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Derivatives, Fair Value [Line Items] | ||
| Amortized cost of the hedged assets | $ 637 | $ 645 |
| Amortized cost of the hedged liabilities | (983) | (989) |
| Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets | 14 | 21 |
| Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets (liabilities) | (108) | (114) |
| Discontinued Hedges | ||
| Derivatives, Fair Value [Line Items] | ||
| Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets (liabilities) | (270) | (278) |
| Unamortized adjustments from discontinued hedges, assets | $ 21 | $ 21 |
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Fair value of all derivative assets designated as fair value hedging instruments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Fair value of all derivative liabilities designated as fair value hedging instruments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk, remaining after discontinued hedge. Excludes cumulative basis adjustment related to foreign exchange risk. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|