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Investments - Commercial Mortgage Loans Segregated by Aging of Loans and Charge Offs by Year of Origination (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Charge offs |  |
2023 | $ 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Credit Quality Indicator Prior Year [Abstract] |  |
Loans under development, amortized cost |  | $ 9
Loans under development, fair value |  | 9
Commercial Mortgage |  |
Credit Quality Indicator Current Year [Abstract] |  |
2023 | 213 | 341
2022 | 288 | 1,300
2021 | 1,256 | 488
2020 | 512 | 0
2019 | 0 | 0
Prior | 259 | 278
Total | 2,528 | 2,407
Charge offs |  |
Prior | 3 |
Total charge-offs | 3 |
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 213 | 341
2021 | 288 | 1,300
2020 | 1,256 | 488
2019 | 512 | 0
2018 | 0 | 0
Prior | 259 | 278
Total | 2,528 | 2,407
Loans under development, amortized cost | 22 |
Loans under development, fair value | 22 |
Commercial Mortgage | Current (less than 30 days past due) |  |
Credit Quality Indicator Current Year [Abstract] |  |
2023 | 213 | 341
2022 | 288 | 1,300
2021 | 1,256 | 488
2020 | 512 | 0
2019 | 0 | 0
Prior | 259 | 269
Total | 2,528 | 2,398
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 213 | 341
2021 | 288 | 1,300
2020 | 1,256 | 488
2019 | 512 | 0
2018 | 0 | 0
Prior | 259 | 269
Total | 2,528 | 2,398
Commercial Mortgage | 30-89 days past due |  |
Credit Quality Indicator Current Year [Abstract] |  |
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
Prior | 0 | 0
Total | 0 | 0
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
Prior | 0 | 0
Total | 0 | 0
Commercial Mortgage | 90 days or more past due |  |
Credit Quality Indicator Current Year [Abstract] |  |
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
Prior | 0 | 9
Total | 0 | 9
Credit Quality Indicator Prior Year [Abstract] |  |
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
Prior | 0 | 9
Total | $ 0 | $ 9

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