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Closed Block (Policyholder Dividend Obligation) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Closed block policyholder dividend obligation |  |  |
Balance at January 1, | $ 0 | $ 1,682 | $ 2,969
Change in unrealized investment and derivative gains (losses) | 0 | (1,682) | (1,287)
Balance at December 31, | $ 0 | $ 0 | $ 1,682

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- Definition Amount of increase (decrease) in the closed block dividend obligation from the unrealized gain (loss) on investments allocated to the closed block. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 805 -Name Accounting Standards Codification -Section 55 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479805/944-805-55-4 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 805 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b)(10) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479835/944-805-50-3 + Details
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- Definition The liability as of the balance sheet date for the excess of the cumulative actual closed block earnings over the cumulative expected (actuarially determined) closed block earnings (each) for the period from the actuarial calculation date to the date of measurement. The excess will result in future dividends to closed block policyholders, unless offset by less favorable than expected future performance of the closed block. The policyholder dividend obligation, which may not have a negative balance, recognizes that a portion of earnings in certain cases will not inure to the stockholders of the insurance entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 805 -Section 55 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479805/944-805-55-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 805 -Section 50 -Paragraph 3 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479835/944-805-50-3 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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