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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 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost of Non-Accrual Loans [Abstract] |  |
Amortized cost of loans on non-accrual | $ 66 | $ 57
Residential mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2024 | 56 | 373
2023 | 404 | 995
2022 | 997 | 877
2021 | 895 | 208
2020 | 203 | 204
Prior | 389 | 195
Credit Quality Indicator Prior Year [Abstract] |  |
2023 | 56 | 373
2022 | 404 | 995
2021 | 997 | 877
2020 | 895 | 208
2019 | 203 | 204
Prior | 389 | 195
Total | 2,944 | 2,852
Amortized Cost of Non-Accrual Loans [Abstract] |  |
Amortized cost of loans on non-accrual | 66 | 57
Commercial mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
Total | 2,563 | 2,528
Credit Quality Indicator Prior Year [Abstract] |  |
Total | 2,563 | 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 | 56 | 373
2023 | 402 | 985
2022 | 984 | 854
2021 | 874 | 192
2020 | 185 | 183
Prior | 361 | 192
Credit Quality Indicator Prior Year [Abstract] |  |
2023 | 56 | 373
2022 | 402 | 985
2021 | 984 | 854
2020 | 874 | 192
2019 | 185 | 183
Prior | 361 | 192
Total | 2,862 | 2,779
Current (less than 30 days past due) | Commercial mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
Total | 2,563 | 2,528
30-89 days past due | Residential mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2024 | 0 | 0
2023 | 1 | 4
2022 | 2 | 7
2021 | 3 | 3
2020 | 6 | 0
Prior | 4 | 2
Credit Quality Indicator Prior Year [Abstract] |  |
2023 | 0 | 0
2022 | 1 | 4
2021 | 2 | 7
2020 | 3 | 3
2019 | 6 | 0
Prior | 4 | 2
Total | 16 | 16
30-89 days past due | Commercial mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
Total | 0 | 0
90 Days or more past due | Residential mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
2024 | 0 | 0
2023 | 1 | 6
2022 | 11 | 16
2021 | 18 | 13
2020 | 12 | 21
Prior | 24 | 1
Credit Quality Indicator Prior Year [Abstract] |  |
2023 | 0 | 0
2022 | 1 | 6
2021 | 11 | 16
2020 | 18 | 13
2019 | 12 | 21
Prior | 24 | 1
Total | 66 | 57
90 Days or more past due | Commercial mortgage loans |  |
Credit Quality Indicator Current Year [Abstract] |  |
Total | $ 0 | $ 0

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