Derivative Instruments - Hedged Items in Fair Value Hedging Relationships (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||
| Hedged asset, carrying amount | $ 1,712,443 | $ 1,343,231 |
| Hedged asset, total basis adjustments | (810) | (344) |
| Hedged asset, discontinued fair value, remaining adjustments | (810) | (344) |
| Closed portfolio, amortized cost | 349,402 | 251,659 |
| Closed portfolio, designated UPB | 45,748 | 39,605 |
| Hedged liability, carrying amount | (25,201) | (28,764) |
| Hedged liability, total basis adjustments | 2,359 | 2,355 |
| Hedged liability, discontinued fair value, remaining adjustments | $ 2,359 | $ 2,355 |
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- Definition Amortized cost of closed portfolio of financial asset and beneficial interest secured by financial instrument, used to designate hedging relationship in which hedged item is expected to be outstanding for designated hedge period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- 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
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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/exampleRef
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- Definition Amount of asset hedged in portfolio layer hedging relationship, expected to be remaining at end of 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, remaining after discontinued hedge. 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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