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Policyholder Account Balances, Future Policy Benefits and Claims - Amounts Recognized in Statement of Operations (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | $ 349 | $ 674
Interest Expense | 195 | 388
Life Contingent Payout Annuities |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 116 | 196
Interest Expense | 28 | 49
Term and Whole Life Insurance |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 86 | 169
Interest Expense | 18 | 37
Disability Income Insurance |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 60 | 124
Interest Expense | 15 | 32
Long Term Care Insurance |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 87 | 185
Interest Expense | $ 134 | $ 270

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