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Investments - Schedule of Residential Loans Segregated by Risk Rating Exposure and Non-accrual Loans by Amortized Cost (Details) - Residential Mortgage - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Credit Quality Indicator Current Year [Abstract] |  |
2023 | $ 373 | $ 771
2022 | 995 | 900
2021 | 877 | 229
2020 | 208 | 223
2019 | 204 | 24
Prior | 195 | 33
Total | 2,852 | 2,180
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 373 | 771
2021 | 995 | 900
2020 | 877 | 229
2019 | 208 | 223
2018 | 204 | 24
Prior | 195 | 33
Total | 2,852 | 2,180
Current (less than 30 days past due) |  |
Credit Quality Indicator Current Year [Abstract] |  |
2023 | 373 | 766
2022 | 985 | 884
2021 | 854 | 214
2020 | 192 | 185
2019 | 183 | 23
Prior | 192 | 33
Total | 2,779 | 2,105
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 373 | 766
2021 | 985 | 884
2020 | 854 | 214
2019 | 192 | 185
2018 | 183 | 23
Prior | 192 | 33
Total | 2,779 | 2,105
30-89 days past due |  |
Credit Quality Indicator Current Year [Abstract] |  |
2023 | 0 | 2
2022 | 4 | 7
2021 | 7 | 0
2020 | 3 | 4
2019 | 0 | 0
Prior | 2 | 0
Total | 16 | 13
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 0 | 2
2021 | 4 | 7
2020 | 7 | 0
2019 | 3 | 4
2018 | 0 | 0
Prior | 2 | 0
Total | 16 | 13
90 days or more past due |  |
Credit Quality Indicator Current Year [Abstract] |  |
2023 | 0 | 3
2022 | 6 | 9
2021 | 16 | 15
2020 | 13 | 34
2019 | 21 | 1
Prior | 1 | 0
Total | 57 | 62
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 0 | 3
2021 | 6 | 9
2020 | 16 | 15
2019 | 13 | 34
2018 | 21 | 1
Prior | 1 | 0
Total | $ 57 | $ 62

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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-5 + Details
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