Derivative Financial Instruments and Hedging Activities Derivative Financial Instruments and Hedging Activities (Schedule of Fair Value Hedging Basis Adjustments) (Details) - Designated as Hedging Instrument - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Debt Available-for-Sale Securities | ||
| Derivative Instruments and Hedging Activities Disclosures [Line Items] | ||
| Hedged Asset, Fair Value Hedge | $ 9,325 | $ 3,304 |
| Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 0 | (22) |
| Long-term Debt | ||
| Derivative Instruments and Hedging Activities Disclosures [Line Items] | ||
| Hedged Liability, Fair Value Hedge | (2,348) | (3,058) |
| Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | $ 52 | $ 91 |
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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/disclosureRef
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- Definition Amount of asset hedged in fair value hedging relationship. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- 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/disclosureRef
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- Definition Amount of liability hedged in fair value hedging relationship. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- 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
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