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Separate Account Assets and Liabilities - Separate Account Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Fair Value, Separate Account Asset |  |  |  |
Separate account assets | $ 77,457 | $ 73,962 | [1] |
Gain (loss) recognized on assets transferred to separate account | 0 | 0 |  | $ 0
Mutual funds |  |  |  |
Fair Value, Separate Account Asset |  |  |  |
Separate account assets | 74,634 | 70,876 |  |
Property/real estate |  |  |  |
Fair Value, Separate Account Asset |  |  |  |
Separate account assets | 1,784 | 1,876 |  |
Equity securities |  |  |  |
Fair Value, Separate Account Asset |  |  |  |
Separate account assets | 553 | 679 |  |
Debt securities |  |  |  |
Fair Value, Separate Account Asset |  |  |  |
Separate account assets | 285 | 279 |  |
Cash and cash equivalents |  |  |  |
Fair Value, Separate Account Asset |  |  |  |
Separate account assets | 147 | 208 |  |
Other |  |  |  |
Fair Value, Separate Account Asset |  |  |  |
Separate account assets | $ 54 | $ 44 |  |
[1] | Certain prior period amounts have been restated. See Note 3 for more information.

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