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Future Contract Benefit - Summary of Gross Premiums and Interest Accretion (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Payout Annuities |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross premiums | $ 21 | $ 28
Interest accretion | 22 | 21
Traditional Life |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross premiums | 314 | 313
Interest accretion | 37 | 35
Group Protection |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross premiums | 896 | 885
Interest accretion | 48 | 42
UL and Other |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross premiums | 766 | 915
Interest accretion | $ 209 | $ 186

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