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Investments - Schedule of Residential Loans Segregated by Risk Rating Exposure and Non-accrual Loans by Amortized Cost (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Amortized Cost of Non-Accrual Loans [Abstract] |  |
Amortized cost of loans on non-accrual | $ 76 | $ 71
Residential mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2022 | 237 | 771
2022 | 955 | 900
2021 | 886 | 229
2020 | 212 | 223
2019 | 212 | 24
Prior | 202 | 33
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 237 | 771
2021 | 955 | 900
2020 | 886 | 229
2019 | 212 | 223
2018 | 212 | 24
Prior | 202 | 33
Total | 2,704 | 2,180
Amortized Cost of Non-Accrual Loans [Abstract] |  |
Amortized cost of loans on non-accrual | 67 | 62
Commercial mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2022 |  | 350
2022 |  | 1,300
2021 |  | 488
2020 |  | 0
2019 |  | 0
Prior |  | 278
Total | 2,513 | 2,407
Credit Quality Indicator Prior Year [Abstract] |  |
2022 |  | 350
2021 |  | 1,300
2020 |  | 488
2019 |  | 0
2018 |  | 0
Prior |  | 278
Total | 2,534 | 2,416
Amortized Cost of Non-Accrual Loans [Abstract] |  |
Amortized cost of loans on non-accrual | 9 | 9
Current (less than 30 days past due) | Residential mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2022 | 236 | 766
2022 | 948 | 884
2021 | 846 | 214
2020 | 190 | 185
2019 | 183 | 23
Prior | 194 | 33
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 236 | 766
2021 | 948 | 884
2020 | 846 | 214
2019 | 190 | 185
2018 | 183 | 23
Prior | 194 | 33
Total | 2,597 | 2,105
Current (less than 30 days past due) | Commercial mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2022 |  | 350
2022 |  | 1,300
2021 |  | 488
2020 |  | 0
2019 |  | 0
Prior |  | 269
Total | 2,504 |
Credit Quality Indicator Prior Year [Abstract] |  |
2022 |  | 350
2021 |  | 1,300
2020 |  | 488
2019 |  | 0
2018 |  | 0
Prior |  | 269
Total |  | 2,407
30-89 days past due | Residential mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2022 | 1 | 2
2022 | 3 | 7
2021 | 15 | 0
2020 | 9 | 4
2019 | 6 | 0
Prior | 6 | 0
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 1 | 2
2021 | 3 | 7
2020 | 15 | 0
2019 | 9 | 4
2018 | 6 | 0
Prior | 6 | 0
Total | 40 | 13
30-89 days past due | Commercial mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2022 |  | 0
2022 |  | 0
2021 |  | 0
2020 |  | 0
2019 |  | 0
Prior |  | 0
Total | 0 |
Credit Quality Indicator Prior Year [Abstract] |  |
2022 |  | 0
2021 |  | 0
2020 |  | 0
2019 |  | 0
2018 |  | 0
Prior |  | 0
Total |  | 0
90 Days or more past due | Residential mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2022 | 0 | 3
2022 | 4 | 9
2021 | 25 | 15
2020 | 13 | 34
2019 | 23 | 1
Prior | 2 | 0
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 0 | 3
2021 | 4 | 9
2020 | 25 | 15
2019 | 13 | 34
2018 | 23 | 1
Prior | 2 | 0
Total | 67 | 62
90 Days or more past due | Commercial mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2022 |  | 0
2022 |  | 0
2021 |  | 0
2020 |  | 0
2019 |  | 0
Prior |  | 9
Total | $ 9 |
Credit Quality Indicator Prior Year [Abstract] |  |
2022 |  | 0
2021 |  | 0
2020 |  | 0
2019 |  | 0
2018 |  | 0
Prior |  | 9
Total |  | $ 9

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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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- Definition Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: 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 + Details
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