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Derivative Financial Instruments - Schedule of Change in Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Call options |  |
Derivative [Line Items] |  |
Change in fair value of derivatives | $ 250 | $ 55
Interest rate swaps |  |
Derivative [Line Items] |  |
Change in fair value of derivatives | (80) | 0
Futures contracts |  |
Derivative [Line Items] |  |
Change in fair value of derivatives | 6 | 5
Foreign currency forwards |  |
Derivative [Line Items] |  |
Change in fair value of derivatives | 3 | (1)
Other embedded derivatives |  |
Derivative [Line Items] |  |
Change in fair value of derivatives | 3 | 1
Reinsurance related embedded derivatives |  |
Derivative [Line Items] |  |
Change in fair value of derivatives | (18) | (19)
Total net investment gains |  |
Derivative [Line Items] |  |
Change in fair value of derivatives | 164 | 41
Indexed annuities/IUL embedded derivatives increase |  |
Derivative [Line Items] |  |
Change in fair value of derivatives | $ 421 | $ 454

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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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