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Managed Investment Entities - Narrative (Details) $ in Millions | 1 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2023 USD ($) collateralized_loan_obligation | May 31, 2022 USD ($) collateralized_loan_obligation | Sep. 30, 2023 USD ($) collateralized_loan_obligation | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |
Percentage of investment of most subordinate debt tranche, Minimum |  |  | 7.40% |  |  |  |  |
Percentage of investment of most subordinate debt tranche, Maximum |  |  | 100.00% |  |  |  |  |
Number of collateralized loan obligation entities | collateralized_loan_obligation |  |  | 16 |  |  |  |  |
Number of collateralized loan obligation entities formed during the period | collateralized_loan_obligation | 1 | 1 |  |  |  |  |  |
Difference between aggregate unpaid principal balance and fair value of CLOs' fixed maturity investments |  |  | $ 143 |  | $ 339 |  |  |
Difference between aggregate unpaid principal balance and carrying value of CLOs' debt |  |  | 319 |  | 413 |  |  |
Carrying amount of CLO loans in default |  |  | 5 |  | 4 |  |  |
Aggregate unpaid principal balance of variable interest entity loans in default |  |  | 13 |  | 17 |  |  |
Available for sale (AFS) fixed maturities |  |  | 9,931 |  | 10,095 |  |  |
Collateralized loan obligations |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |
Available for sale (AFS) fixed maturities |  |  | 1,723 |  | 1,921 |  |  |
Collateralized loan obligations | Managed by third parties |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |
Available for sale (AFS) fixed maturities |  |  | 1,720 |  | 1,920 |  |  |
Variable interest entity, primary beneficiary |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |
Investment in CLO tranches |  |  | 143 |  | 115 |  |  |
Amount invested in a temporary warehousing entity |  |  | 120 | $ 117 | $ 112 | $ 85 | $ 85 | $ 76
Variable interest entity, primary beneficiary | Subordinated Debt Obligations |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |
Investment in CLO tranches |  |  | 88 |  |  |  |  |
New collateralized loan obligation temporary warehousing entities |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |
Amount invested in a temporary warehousing entity |  |  | $ 23 |  |  | $ 12 |  |
New Collateralized Loan Obligation Entities |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |
Face value of liabilities issued by managed investment entities on issuance date | $ 407 | $ 404 |  |  |  |  |  |
Face amount of managed investment entities liabilities purchased at issuance date | $ 16 | $ 13 |  |  |  |  |  |

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