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Future Policy Benefits - Gross Premium Income and Interest Expense (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross premium income | $ 977 | $ 811
Interest expense | 157 | 102
Traditional Life |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross premium income | 57 | 63
Interest expense | 18 | 19
Immediate Annuities |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross premium income | 12 | 11
Interest expense | 30 | 33
PRT |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross premium income | 908 | 737
Interest expense | $ 109 | $ 50

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