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Policyholder Liabilities - Account Balances by Guaranteed Minimum Interest Rates (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 59,019,189 | $ 58,781,836 |
Fixed Index Annuities |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 53,361,121 | 53,808,184 | $ 55,001,391
Allocated to index strategies | 44,880,528 | 45,533,014 |
Fixed Index Annuities | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 1,395,849 | $ 1,184,711 |
Fixed Index Annuities | 0.00% - 0.50% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 0.00% | 0.00% |
Fixed Index Annuities | 0.00% - 0.50% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 0.50% | 0.50% |
Fixed Index Annuities | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 5,895,765 | $ 5,856,469 |
Fixed Index Annuities | 0.50% - 1.00% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 0.50% | 0.50% |
Fixed Index Annuities | 0.50% - 1.00% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 1.00% | 1.00% |
Fixed Index Annuities | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 59,948 | $ 60,977 |
Fixed Index Annuities | 1.00% - 1.50% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 1.00% | 1.00% |
Fixed Index Annuities | 1.00% - 1.50% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 1.50% | 1.50% |
Fixed Index Annuities | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 57 | $ 57 |
Fixed Index Annuities | 1.50% - 2.00% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 1.50% | 1.50% |
Fixed Index Annuities | 1.50% - 2.00% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 2.00% | 2.00% |
Fixed Index Annuities | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 223,311 | $ 233,272 |
Fixed Index Annuities | 2.00% - 2.50% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 2.00% | 2.00% |
Fixed Index Annuities | 2.00% - 2.50% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 2.50% | 2.50% |
Fixed Index Annuities | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 905,663 | $ 939,684 |
Fixed Index Annuities | 2.50% - 3.00% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 2.50% | 2.50% |
Fixed Index Annuities | 2.50% - 3.00% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 3.00% | 3.00% |
Fixed Index Annuities | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 0 | $ 0 |
Fixed Index Annuities | Greater than 3.00% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 3.00% | 3.00% |
Fixed Index Annuities | At guaranteed minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 3,538,322 | $ 3,545,630 |
Fixed Index Annuities | At guaranteed minimum | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | At guaranteed minimum | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 2,449,974 | 2,421,244 |
Fixed Index Annuities | At guaranteed minimum | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 50,601 | 51,586 |
Fixed Index Annuities | At guaranteed minimum | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 57 | 57 |
Fixed Index Annuities | At guaranteed minimum | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 132,027 | 133,059 |
Fixed Index Annuities | At guaranteed minimum | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 905,663 | 939,684 |
Fixed Index Annuities | At guaranteed minimum | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | 1 to 50 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 1,750,760 | 1,670,284 |
Fixed Index Annuities | 1 to 50 | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 545,301 | 462,356 |
Fixed Index Annuities | 1 to 50 | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 1,104,836 | 1,098,332 |
Fixed Index Annuities | 1 to 50 | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 9,347 | 9,391 |
Fixed Index Annuities | 1 to 50 | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | 1 to 50 | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 91,276 | 100,205 |
Fixed Index Annuities | 1 to 50 | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | 1 to 50 | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | 51 to 150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 2,694,733 | 2,666,031 |
Fixed Index Annuities | 51 to 150 | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 443,724 | 407,031 |
Fixed Index Annuities | 51 to 150 | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 2,251,001 | 2,258,992 |
Fixed Index Annuities | 51 to 150 | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | 51 to 150 | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | 51 to 150 | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 8 | 8 |
Fixed Index Annuities | 51 to 150 | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | 51 to 150 | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | Greater than 150 basis points above |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 496,778 | 393,225 |
Fixed Index Annuities | Greater than 150 basis points above | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 406,824 | 315,324 |
Fixed Index Annuities | Greater than 150 basis points above | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 89,954 | 77,901 |
Fixed Index Annuities | Greater than 150 basis points above | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | Greater than 150 basis points above | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | Greater than 150 basis points above | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | Greater than 150 basis points above | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Index Annuities | Greater than 150 basis points above | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 6,849,542 | 6,589,577 | $ 6,860,060
Fixed Rate Annuities | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 101 | $ 61 |
Fixed Rate Annuities | 0.00% - 0.50% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 0.00% | 0.00% |
Fixed Rate Annuities | 0.00% - 0.50% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 0.50% | 0.50% |
Fixed Rate Annuities | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 5,266,212 | $ 4,961,020 |
Fixed Rate Annuities | 0.50% - 1.00% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 0.50% | 0.50% |
Fixed Rate Annuities | 0.50% - 1.00% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 1.00% | 1.00% |
Fixed Rate Annuities | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 453,295 | $ 454,959 |
Fixed Rate Annuities | 1.00% - 1.50% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 1.00% | 1.00% |
Fixed Rate Annuities | 1.00% - 1.50% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 1.50% | 1.50% |
Fixed Rate Annuities | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 643,147 | $ 655,703 |
Fixed Rate Annuities | 1.50% - 2.00% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 1.50% | 1.50% |
Fixed Rate Annuities | 1.50% - 2.00% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 2.00% | 2.00% |
Fixed Rate Annuities | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 19,008 | $ 21,909 |
Fixed Rate Annuities | 2.00% - 2.50% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 2.00% | 2.00% |
Fixed Rate Annuities | 2.00% - 2.50% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 2.50% | 2.50% |
Fixed Rate Annuities | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 414,276 | $ 441,459 |
Fixed Rate Annuities | 2.50% - 3.00% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 2.50% | 2.50% |
Fixed Rate Annuities | 2.50% - 3.00% | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 3.00% | 3.00% |
Fixed Rate Annuities | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 53,503 | $ 54,466 |
Fixed Rate Annuities | Greater than 3.00% | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance, guaranteed minimum credit rating | 3.00% | 3.00% |
Fixed Rate Annuities | At guaranteed minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 1,266,444 | $ 1,302,275 |
Fixed Rate Annuities | At guaranteed minimum | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | At guaranteed minimum | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 55,547 | 55,458 |
Fixed Rate Annuities | At guaranteed minimum | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 453,063 | 454,728 |
Fixed Rate Annuities | At guaranteed minimum | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 278,374 | 281,694 |
Fixed Rate Annuities | At guaranteed minimum | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 18,985 | 21,887 |
Fixed Rate Annuities | At guaranteed minimum | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 406,972 | 434,042 |
Fixed Rate Annuities | At guaranteed minimum | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 53,503 | 54,466 |
Fixed Rate Annuities | 1 to 50 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 301,968 | 307,960 |
Fixed Rate Annuities | 1 to 50 | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | 1 to 50 | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 201,007 | 203,523 |
Fixed Rate Annuities | 1 to 50 | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 232 | 231 |
Fixed Rate Annuities | 1 to 50 | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 93,402 | 96,767 |
Fixed Rate Annuities | 1 to 50 | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 23 | 22 |
Fixed Rate Annuities | 1 to 50 | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 7,304 | 7,417 |
Fixed Rate Annuities | 1 to 50 | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | 51 to 150 |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 4,266,579 | 4,277,256 |
Fixed Rate Annuities | 51 to 150 | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | 51 to 150 | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 3,995,398 | 4,000,203 |
Fixed Rate Annuities | 51 to 150 | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | 51 to 150 | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 271,181 | 277,053 |
Fixed Rate Annuities | 51 to 150 | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | 51 to 150 | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | 51 to 150 | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | Greater than 150 basis points above |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 1,014,551 | 702,086 |
Fixed Rate Annuities | Greater than 150 basis points above | 0.00% - 0.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 101 | 61 |
Fixed Rate Annuities | Greater than 150 basis points above | 0.50% - 1.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 1,014,260 | 701,836 |
Fixed Rate Annuities | Greater than 150 basis points above | 1.00% - 1.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | Greater than 150 basis points above | 1.50% - 2.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 190 | 189 |
Fixed Rate Annuities | Greater than 150 basis points above | 2.00% - 2.50% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | Greater than 150 basis points above | 2.50% - 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | 0 | 0 |
Fixed Rate Annuities | Greater than 150 basis points above | Greater than 3.00% |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder account balance | $ 0 | $ 0 |

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