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Derivative Instruments - Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Amortized cost of the hedged assets | $ 497 | $ 484
Amortized cost of the hedged liabilities | (691) | (676)
Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets | 19 | 7
Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets (liabilities) | 184 | 199
Discontinued Hedges |  |
Derivatives, Fair Value [Line Items] |  |
Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets (liabilities) | $ (306) | $ (310)

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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 181 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-181 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4EE -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4EE + Details
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