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Reinsurance (Narrative) (Details) $ in Millions |  |  |  |  |  | 12 Months Ended | 21 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 01, 2023 USD ($) | Apr. 01, 2023 USD ($) | Apr. 01, 2022 | Apr. 01, 2015 | Jan. 02, 2013 USD ($) policy | Dec. 31, 2023 company | Dec. 31, 2020 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2021 counterparty | May 31, 2018 counterparty
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage |  |  |  |  |  | 69.00% |  |  |  |  |  |
Number of major reinsurance companies | company |  |  |  |  |  | 4 |  |  |  |  |  |
Geographic Distribution, Domestic |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance, retention policy, amount retained per life |  |  |  |  |  |  | $ 10 | $ 20 | $ 30 |  |  |
Hartford Life Business |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, amount retained per event |  |  |  |  | $ 141,000 |  |  |  |  |  |  |
Business acquisition number of life insurance policies acquired reinsurance | policy |  |  |  |  | 700,000 |  |  |  |  |  |  |
Number Of Counterparties | counterparty |  |  |  |  |  |  |  |  |  |  |  | 2
Prismic Re |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsured Amount | $ 9,000 |  |  |  |  |  |  |  |  |  |  |
Deferred Reinsurance Loss | $ (240) |  |  |  |  |  |  |  |  |  |  |
Prismic Re | Structured Settlement Annuity |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage | 70.00% |  |  |  |  |  |  |  |  |  |  |
Prismic Re | Coinsurance with funds witheld |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage | 90.00% |  |  |  |  |  |  |  |  |  |  |
Prismic Re | Coinsurance |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage | 10.00% |  |  |  |  |  |  |  |  |  |  |
AuguStar |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsured Amount |  | $ 10,000 |  |  |  |  |  |  |  |  |  |
Deferred Reinsurance Gain |  | $ 309 |  |  |  |  |  |  |  |  |  |
AuguStar | Separate account liabilities under MODCO |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage |  | 100.00% |  |  |  |  |  |  |  |  |  |
AuguStar | General account liabilities under MODCO |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage |  | 100.00% |  |  |  |  |  |  |  |  |  |
AuguStar | Variable Annuity |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage |  | 10.00% |  |  |  |  |  |  |  |  |  |
Empower | Separate account liabilities under MODCO |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage |  |  | 100.00% |  |  |  |  |  |  |  |  |
Empower | General account liabilities under MODCO |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage |  |  | 100.00% |  |  |  |  |  |  |  |  |
Union Hamilton | Quote Share Reinsurance for HDI v.3.0 VA Business |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reinsurance retention policy, reinsured risk percentage |  |  |  | 50.00% |  |  |  |  |  |  |  |
Reinsurance retention policy, amount retained per event |  |  |  |  |  |  |  |  |  | $ 2,900 |  |
Allstate |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number Of Counterparties | counterparty |  |  |  |  |  |  |  |  |  |  | 2 |

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