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Contractholder Funds - Summary of Balances and Changes in Contractholder Funds (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Policyholder Account Balance [Roll Forward] |  |  |
Balance, beginning of year | $ 48,798 |  |
Balance, end of year | 50,875 |  | $ 48,798
Embedded derivative adjustment | 5 | $ 2 |
Gross Liability, end of period | 50,875 |  | 48,798
Less: Reinsurance | (10,129) |  | (8,977)
Indexed Annuity |  |  |
Policyholder Account Balance [Roll Forward] |  |  |
Balance, beginning of year | 27,164 | 24,766 | 24,766
Issuances | 1,381 |  | 4,722
Premiums received | 28 |  | 103
Policy charge | (46) |  | (182)
Surrenders and withdrawals | (690) |  | (2,005)
Benefit payments | (119) |  | (526)
Interest credited | 139 |  | 270
Other | 5 |  | 16
Balance, end of year | 27,862 |  | 27,164
Embedded derivative adjustment | 468 |  | 243
Gross Liability, end of period | 28,330 |  | 27,407
Less: Reinsurance | (13) |  | (17)
Net Liability, after Reinsurance | $ 28,317 |  | $ 27,390
Weighted-average crediting rate | 2.04% |  | 1.40%
Cash surrender value | $ 25,724 |  | $ 25,099
Fixed Rate Annuities |  |  |
Policyholder Account Balance [Roll Forward] |  |  |
Balance, beginning of year | 13,443 | 9,358 | 9,358
Issuances | 1,341 |  | 5,061
Premiums received | 0 |  | 1
Policy charge | 0 |  | 0
Surrenders and withdrawals | (364) |  | (1,142)
Benefit payments | (76) |  | (240)
Interest credited | 142 |  | 405
Other | 0 |  | 0
Balance, end of year | 14,486 |  | 13,443
Embedded derivative adjustment | 0 |  | 0
Gross Liability, end of period | 14,486 |  | 13,443
Less: Reinsurance | (8,612) |  | (7,520)
Net Liability, after Reinsurance | $ 5,874 |  | $ 5,923
Weighted-average crediting rate | 4.15% |  | 4.85%
Cash surrender value | $ 13,502 |  | $ 12,505
Universal Life |  |  |
Policyholder Account Balance [Roll Forward] |  |  |
Balance, beginning of year | 2,391 | 2,112 | 2,112
Issuances | 51 |  | 199
Premiums received | 114 |  | 382
Policy charge | (74) |  | (261)
Surrenders and withdrawals | (22) |  | (90)
Benefit payments | (5) |  | (27)
Interest credited | 33 |  | 76
Other | 0 |  | 0
Balance, end of year | 2,488 |  | 2,391
Embedded derivative adjustment | 107 |  | 84
Gross Liability, end of period | 2,595 |  | 2,475
Less: Reinsurance | (894) |  | (894)
Net Liability, after Reinsurance | $ 1,701 |  | $ 1,581
Weighted-average crediting rate | 5.54% |  | 3.44%
Net amount at risk | $ 63,968 |  | $ 60,389
Cash surrender value | 1,938 |  | 1,872
Funding Agreements, FABN |  |  |
Policyholder Account Balance [Roll Forward] |  |  |
Balance, beginning of year | 2,613 | 2,613 | 2,613
Issuances | 0 |  | 0
Premiums received | 0 |  | 0
Policy charge | 0 |  | 0
Surrenders and withdrawals | 0 |  | 0
Benefit payments | (16) |  | (53)
Interest credited | 14 |  | 54
Other | 0 |  | (1)
Balance, end of year | 2,611 |  | 2,613
Embedded derivative adjustment | 0 |  | 0
Gross Liability, end of period | 2,611 |  | 2,613
Less: Reinsurance | 0 |  | 0
Net Liability, after Reinsurance | 2,611 |  | 2,613
FHLB |  |  |
Policyholder Account Balance [Roll Forward] |  |  |
Balance, beginning of year | 2,539 | $ 1,982 | 1,982
Issuances | 305 |  | 1,256
Premiums received | 0 |  | 0
Policy charge | 0 |  | 0
Surrenders and withdrawals | 0 |  | 0
Benefit payments | (329) |  | (763)
Interest credited | 24 |  | 64
Other | 0 |  | 0
Balance, end of year | 2,539 |  | 2,539
Embedded derivative adjustment | 0 |  | 0
Gross Liability, end of period | 2,539 |  | 2,539
Less: Reinsurance | 0 |  | 0
Net Liability, after Reinsurance | $ 2,539 |  | $ 2,539

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