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Investments - Changes in Allowance for Credit Losses on AFS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance as of beginning-of-period | $ 21 | $ 39 | $ 19 | $ 22
Additions from purchases of PCD debt securities | 0 | 0 | 0 | 0
Additions for securities for which credit losses were not previously recognized | 16 | 2 | 17 | 21
Additions (reductions) for securities for which credit losses were previously recognized | 8 | (3) | 11 | (4)
Reductions for disposed securities | (1) |  | (3) | (1)
Reductions for securities charged-off | (5) | (13) | (5) | (13)
Balance as of end-of-period | 39 | 25 | 39 | 25
Accrued interest receivable on fixed maturity AFS securities |  |  | 906 | 1,100
Corporate bonds |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance as of beginning-of-period | 10 | 27 | 8 | 9
Additions from purchases of PCD debt securities | 0 | 0 | 0 | 0
Additions for securities for which credit losses were not previously recognized | 1 | 2 | 2 | 21
Additions (reductions) for securities for which credit losses were previously recognized | 8 | (3) | 11 | (3)
Reductions for disposed securities | (1) |  | (3) | (1)
Reductions for securities charged-off | (5) | (13) | (5) | (13)
Balance as of end-of-period | 13 | 13 | 13 | 13
RMBS |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance as of beginning-of-period | 6 | 6 | 6 | 7
Additions from purchases of PCD debt securities | 0 | 0 | 0 | 0
Additions for securities for which credit losses were not previously recognized | 0 | 0 | 0 | 0
Additions (reductions) for securities for which credit losses were previously recognized | 0 | 0 | 0 | (1)
Reductions for disposed securities | 0 |  | 0 | 0
Reductions for securities charged-off | 0 | 0 | 0 | 0
Balance as of end-of-period | 6 | 6 | 6 | 6
ABS |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance as of beginning-of-period | 4 | 5 | 4 | 5
Additions from purchases of PCD debt securities | 0 | 0 | 0 | 0
Additions for securities for which credit losses were not previously recognized | 15 | 0 | 15 | 0
Additions (reductions) for securities for which credit losses were previously recognized | 0 | 0 | 0 | 0
Reductions for disposed securities | 0 |  | 0 | 0
Reductions for securities charged-off | 0 | 0 | 0 | 0
Balance as of end-of-period | 19 | 5 | 19 | 5
Hybrids |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance as of beginning-of-period | 1 | 1 | 1 | 1
Additions from purchases of PCD debt securities | 0 | 0 | 0 | 0
Additions for securities for which credit losses were not previously recognized | 0 | 0 | 0 | 0
Additions (reductions) for securities for which credit losses were previously recognized | 0 | 0 | 0 | 0
Reductions for disposed securities | 0 |  | 0 | 0
Reductions for securities charged-off | 0 | 0 | 0 | 0
Balance as of end-of-period | $ 1 | $ 1 | $ 1 | $ 1

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- Definition Amount of writeoff of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized by reversing interest income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3D -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-3D + Details
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- Definition Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
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