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Investments - Schedule of Residential Loans Segregated by Aging of Loans (By Year of Origination) and Non-accrual Loans by Amortized Cost (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost of Non-Accrual Loans [Abstract] |  |
Amortized cost of loans on non-accrual | $ 74 | $ 57
Residential Mortgage Loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2024 | 393 | 373
2023 | 377 | 995
2022 | 946 | 877
2021 | 858 | 208
2020 | 182 | 204
Prior | 349 | 195
Credit Quality Indicator Prior Year [Abstract] |  |
2023 | 393 | 373
2022 | 377 | 995
2021 | 946 | 877
2020 | 858 | 208
2019 | 182 | 204
Prior | 349 | 195
Total | 3,105 | 2,852
Amortized Cost of Non-Accrual Loans [Abstract] |  |
Amortized cost of loans on non-accrual | 74 | 57
Commercial Mortgage Loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
Total | 2,590 | 2,528
Credit Quality Indicator Prior Year [Abstract] |  |
Total | 2,590 | 2,550
Amortized Cost of Non-Accrual Loans [Abstract] |  |
Amortized cost of loans on non-accrual | 0 | 0
Current (less than 30 days past due) | Residential Mortgage Loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2024 | 387 | 373
2023 | 372 | 985
2022 | 928 | 854
2021 | 822 | 192
2020 | 168 | 183
Prior | 317 | 192
Credit Quality Indicator Prior Year [Abstract] |  |
2023 | 387 | 373
2022 | 372 | 985
2021 | 928 | 854
2020 | 822 | 192
2019 | 168 | 183
Prior | 317 | 192
Total | 2,994 | 2,779
Current (less than 30 days past due) | Commercial Mortgage Loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
Total | 2,581 | 2,528
30-89 days past due | Residential Mortgage Loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2024 | 6 | 0
2023 | 3 | 4
2022 | 9 | 7
2021 | 8 | 3
2020 | 4 | 0
Prior | 7 | 2
Credit Quality Indicator Prior Year [Abstract] |  |
2023 | 6 | 0
2022 | 3 | 4
2021 | 9 | 7
2020 | 8 | 3
2019 | 4 | 0
Prior | 7 | 2
Total | 37 | 16
30-89 days past due | Commercial Mortgage Loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
Total | 9 | 0
90 days or more past due | Residential Mortgage Loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2024 | 0 | 0
2023 | 2 | 6
2022 | 9 | 16
2021 | 28 | 13
2020 | 10 | 21
Prior | 25 | 1
Credit Quality Indicator Prior Year [Abstract] |  |
2023 | 0 | 0
2022 | 2 | 6
2021 | 9 | 16
2020 | 28 | 13
2019 | 10 | 21
Prior | 25 | 1
Total | 74 | 57
90 days or more past due | Commercial Mortgage Loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
Total | $ 0 | $ 0

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