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Contractholder Funds - Account Values by Range of Guaranteed Minimum Credit Rating (Details) $ in Millions | Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | --- | ---
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | $ 53,602 | $ 48,798 |
Indexed Annuity |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 28,570 | 27,164 | $ 24,766
Indexed Annuity | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 23,763 | 22,965 |
Indexed Annuity | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1,339 | 1,446 |
Indexed Annuity | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 767 | 550 |
Indexed Annuity | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 2,701 | 2,203 |
Indexed Annuity | 0.00%-1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 26,648 | 26,315 |
Indexed Annuity | 0.00%-1.50% | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 22,909 | 22,392 |
Indexed Annuity | 0.00%-1.50% | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1,336 | 1,444 |
Indexed Annuity | 0.00%-1.50% | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 512 | 526 |
Indexed Annuity | 0.00%-1.50% | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1,891 | 1,953 |
Indexed Annuity | 1.51%-2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1,587 | 471 |
Indexed Annuity | 1.51%-2.50% | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 521 | 196 |
Indexed Annuity | 1.51%-2.50% | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1 | 1 |
Indexed Annuity | 1.51%-2.50% | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 255 | 24 |
Indexed Annuity | 1.51%-2.50% | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 810 | 250 |
Indexed Annuity | Greater than 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 335 | 378 |
Indexed Annuity | Greater than 2.50% | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 333 | 377 |
Indexed Annuity | Greater than 2.50% | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 2 | 1 |
Indexed Annuity | Greater than 2.50% | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 0 | 0 |
Indexed Annuity | Greater than 2.50% | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 0 | 0 |
Fixed Rate Annuities |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 15,542 | 13,443 | 9,358
Fixed Rate Annuities | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 888 | 921 |
Fixed Rate Annuities | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 31 | 35 |
Fixed Rate Annuities | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1,146 | 1,559 |
Fixed Rate Annuities | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 13,477 | 10,928 |
Fixed Rate Annuities | 0.00%-1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 13,585 | 11,851 |
Fixed Rate Annuities | 0.00%-1.50% | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 35 | 23 |
Fixed Rate Annuities | 0.00%-1.50% | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 22 | 25 |
Fixed Rate Annuities | 0.00%-1.50% | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1,123 | 1,532 |
Fixed Rate Annuities | 0.00%-1.50% | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 12,405 | 10,271 |
Fixed Rate Annuities | 1.51%-2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 488 | 489 |
Fixed Rate Annuities | 1.51%-2.50% | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 4 | 5 |
Fixed Rate Annuities | 1.51%-2.50% | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 7 | 8 |
Fixed Rate Annuities | 1.51%-2.50% | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 20 | 23 |
Fixed Rate Annuities | 1.51%-2.50% | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 457 | 453 |
Fixed Rate Annuities | Greater than 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1,469 | 1,103 |
Fixed Rate Annuities | Greater than 2.50% | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 849 | 893 |
Fixed Rate Annuities | Greater than 2.50% | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 2 | 2 |
Fixed Rate Annuities | Greater than 2.50% | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 3 | 4 |
Fixed Rate Annuities | Greater than 2.50% | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 615 | 204 |
Universal Life |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 2,587 | 2,391 | $ 2,112
Universal Life | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 2,557 | 2,348 |
Universal Life | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 6 | 21 |
Universal Life | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1 | 1 |
Universal Life | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 23 | 21 |
Universal Life | 0.00%-1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 2,214 | 2,013 |
Universal Life | 0.00%-1.50% | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 2,185 | 1,987 |
Universal Life | 0.00%-1.50% | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 6 | 5 |
Universal Life | 0.00%-1.50% | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 0 | 0 |
Universal Life | 0.00%-1.50% | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 23 | 21 |
Universal Life | 1.51%-2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 0 | 0 |
Universal Life | 1.51%-2.50% | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 0 | 0 |
Universal Life | 1.51%-2.50% | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 0 | 0 |
Universal Life | 1.51%-2.50% | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 0 | 0 |
Universal Life | 1.51%-2.50% | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 0 | 0 |
Universal Life | Greater than 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 373 | 378 |
Universal Life | Greater than 2.50% | At Guaranteed Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 372 | 361 |
Universal Life | Greater than 2.50% | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 0 | 16 |
Universal Life | Greater than 2.50% | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | 1 | 1 |
Universal Life | Greater than 2.50% | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Contractholder funds | $ 0 | $ 0 |
Minimum | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0001 | 0.0001 |
Minimum | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0051 | 0.0051 |
Minimum | Greater Than 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0150 | 0.0150 |
Maximum | Range from 0001 to 0050 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0050 | 0.0050 |
Maximum | Range from 0051 to 0150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0150 | 0.0150 |

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