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Separate Accounts - Schedule of Reconciliation of Separate Account Liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Separate Account, Liability [Roll Forward] |  |
Balance as of beginning-of-year | $ 158,257 |
Balance as of end-of-year | 168,438 | $ 158,257
Variable Annuities |  |
Separate Account, Liability [Roll Forward] |  |
Balance as of beginning-of-year | 113,356 | 105,573
Gross deposits | 4,765 | 2,982
Withdrawals | (14,074) | (10,177)
Policyholder assessments | (2,639) | (2,510)
Change in market performance | 15,548 | 16,870
Net transfers from (to) general account | 1,042 | 618
Balance as of end-of-year | 117,998 | 113,356
Cash surrender value | 116,612 | 111,928
UL and Other |  |
Separate Account, Liability [Roll Forward] |  |
Balance as of beginning-of-year | 25,150 | 20,920
Gross deposits | 1,483 | 1,630
Withdrawals | (477) | (313)
Policyholder assessments | (995) | (964)
Change in market performance | 3,876 | 3,973
Net transfers from (to) general account | (196) | (96)
Balance as of end-of-year | 28,841 | 25,150
Cash surrender value | 26,435 | 22,760
Retirement Plan Services |  |
Separate Account, Liability [Roll Forward] |  |
Balance as of beginning-of-year | 19,699 | 16,996
Gross deposits | 2,302 | 2,222
Withdrawals | (3,378) | (2,527)
Policyholder assessments | (182) | (163)
Change in market performance | 3,072 | 3,221
Net transfers from (to) general account | 28 | (50)
Balance as of end-of-year | 21,541 | 19,699
Cash surrender value | $ 21,526 | $ 19,684

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