Market Risk Benefits - Market Risk Benefits In Asset and Liability Positions (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022		Dec. 31, 2021	Jan. 01, 2021
Liability for Future Policy Benefit, Activity [Line Items]
Market risk benefit assets	$ 2,340,230	$ 1,423,000	$ 1,393,237	[1]
Market risk benefit liabilities	5,089,766	6,686,000	5,521,601	[1]
Variable Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Net amount at risk	$ 10,067,522	$ 10,510,747
Weighted-average attained age of contractholders	69 years	68 years
Market risk benefit assets	$ 2,340,230	$ 1,422,757
Market risk benefit liabilities	5,089,766	6,685,895
Net liability	$ 2,749,536	$ 5,263,138	$ 4,550,625		$ 8,884,362	$ (12,032)

[1] Prior period amounts adjusted for the implementation of Accounting Standard Update ("ASU") 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.