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Policyholder Account Balances - Summary of Balances and Changes in Policyholder Account Balances (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Policyholder Account Balance [Roll Forward] |  |
Balance as of beginning-of-year | $ 120,737 |
Interest credited | 822 | $ 785
Balance as of end-of-period | 122,300 |
Variable Annuities |  |
Policyholder Account Balance [Roll Forward] |  |
Balance as of beginning-of-year | 29,141 | 22,184
Gross deposits | 973 | 1,222
Withdrawals | (224) | (170)
Policyholder assessments | 0 | 0
Net transfers from (to) separate account | (178) | (114)
Interest credited | 158 | 109
Change in fair value of embedded derivative instrument | 1,538 | 540
Balance as of end-of-period | $ 31,408 | $ 23,771
Weighted-average crediting rate | 2.10% | 1.90%
Net amount at risk | $ 2,056 | $ 6,268
Cash surrender value | 30,228 | 22,698
Fixed Annuities |  |
Policyholder Account Balance [Roll Forward] |  |
Balance as of beginning-of-year | 25,355 | 23,365
Gross deposits | 973 | 1,317
Withdrawals | (1,410) | (889)
Policyholder assessments | (17) | (15)
Net transfers from (to) separate account | 0 | 0
Interest credited | 183 | 154
Change in fair value of embedded derivative instrument | 78 | 87
Balance as of end-of-period | $ 25,162 | $ 24,019
Weighted-average crediting rate | 2.90% | 2.60%
Net amount at risk | $ 210 | $ 192
Cash surrender value | 24,139 | 23,125
UL and Other |  |
Policyholder Account Balance [Roll Forward] |  |
Balance as of beginning-of-year | 37,180 | 37,694
Gross deposits | 850 | 926
Withdrawals | (364) | (393)
Policyholder assessments | (1,124) | (1,128)
Net transfers from (to) separate account | 38 | 32
Interest credited | 365 | 373
Change in fair value of embedded derivative instrument | 61 | 29
Balance as of end-of-period | $ 37,006 | $ 37,533
Weighted-average crediting rate | 3.90% | 4.00%
Net amount at risk | $ 300,740 | $ 303,412
Cash surrender value | 33,314 | 34,033
Retirement Plan Services |  |
Policyholder Account Balance [Roll Forward] |  |
Balance as of beginning-of-year | 23,784 | 25,138
Gross deposits | 790 | 701
Withdrawals | (1,203) | (1,113)
Policyholder assessments | (3) | (3)
Net transfers from (to) separate account | 50 | 103
Interest credited | 168 | 168
Change in fair value of embedded derivative instrument | 0 | 0
Balance as of end-of-period | $ 23,586 | $ 24,994
Weighted-average crediting rate | 2.80% | 2.70%
Net amount at risk | $ 3 | $ 9
Cash surrender value | $ 23,560 | $ 24,989

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