Future Policy Benefits - Schedule of Amount of Discounted (using the then current discount rate) and Undiscounted Expected Gross Premiums and Expected Future Benefit Payments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Liability for Future Policy Benefit, after Reinsurance [Abstract]
Expected future benefit payments, Undiscounted	$ 33,839,938	$ 33,342,272
Expected future benefit payments, Discounted	19,977,311	20,508,435
Expected future gross premiums, Undiscounted	39,155,381	38,701,869
Expected future gross premiums, Discounted	$ 26,164,310	$ 26,687,880