Market Risk Benefits - Rollforward of Balances for Variable Annuity Products (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Variable Annuities
Market Risk Benefit [Roll Forward]
Balance, beginning of period	$ 4,550,625	$ 8,884,362
Effect of cumulative changes in non-performance risk	1,727,910	287,605
Balance, beginning of period, before effect of changes in non-performance risk	6,278,535	9,171,967
Attributed fees collected	587,663	659,743
Claims paid	(43,782)	(16,431)
Interest accrual	160,106	26,589
Actual in force different from expected	36,193	44,344
Effect of changes in interest rates	(671,989)	(5,067,986)
Effect of changes in equity markets	(1,314,461)	3,238,166
Effect of assumption update	330,769	(160,596)
Issuances	11,403
Other adjustments	(17,436)
Effect of changes in current period counterparty non-performance risk	0	0
Balance, end of period, before effect of changes in non-performance risk	5,357,001	7,895,796
Effect of cumulative changes in non-performance risk	(1,660,587)	(2,077,191)
Balance, end of period	3,696,414	5,818,605
Less: Reinsured Market Risk Benefits
Market Risk Benefit [Roll Forward]
Balance, beginning of period	(422,261)	(906,484)
Effect of cumulative changes in non-performance risk	0	0
Balance, beginning of period, before effect of changes in non-performance risk	(422,261)	(906,484)
Attributed fees collected	(107,425)	(77,427)
Claims paid	3,681	318
Interest accrual	(20,505)	(2,564)
Actual in force different from expected	(6,069)	(4,746)
Effect of changes in interest rates	169,229	527,662
Effect of changes in equity markets	127,157	(339,149)
Effect of assumption update	(54,067)	23,170
Issuances	9,025
Other adjustments	(638,198)
Effect of changes in current period counterparty non-performance risk	(7,445)	223,753
Balance, end of period, before effect of changes in non-performance risk	(946,878)	(555,467)
Effect of cumulative changes in non-performance risk	0	0
Balance, end of period	(946,878)	(555,467)
Less: Reinsured Market Risk Benefits | Ohio National
Market Risk Benefit [Roll Forward]
Other adjustments	638,000
Total, Net of Reinsurance
Market Risk Benefit [Roll Forward]
Balance, beginning of period	4,128,364	7,977,878
Effect of cumulative changes in non-performance risk	1,727,910	287,605
Balance, beginning of period, before effect of changes in non-performance risk	5,856,274	8,265,483
Attributed fees collected	480,238	582,316
Claims paid	(40,101)	(16,113)
Interest accrual	139,601	24,025
Actual in force different from expected	30,124	39,598
Effect of changes in interest rates	(502,760)	(4,540,324)
Effect of changes in equity markets	(1,187,304)	2,899,017
Effect of assumption update	276,702	(137,426)
Issuances	20,428
Other adjustments	(655,634)
Effect of changes in current period counterparty non-performance risk	(7,445)	223,753
Balance, end of period, before effect of changes in non-performance risk	4,410,123	7,340,329
Effect of cumulative changes in non-performance risk	(1,660,587)	(2,077,191)
Balance, end of period	$ 2,749,536	$ 5,263,138