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Derivatives - Non-qualifying Strategies (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Non-qualifying foreign currency derivatives | $ (2) | $ 5
Interest rate swaps and futures |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Non-qualifying foreign currency derivatives | 3 | 21
Credit derivatives that assume credit risk | Credit derivatives that purchase credit protection |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Non-qualifying foreign currency derivatives | 0 | (16)
Equity Option [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Non-qualifying foreign currency derivatives | $ (5) | $ 0

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A + Details
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