Additional Insurance Liabilities - Summary of Weighted-Average Anterest rates for the Liability for Additional Insurance Liabilities (Details)		Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Weighted Average Interest Rates for the Liability for Additional Insurance Liabilities [Abstract]
Interest accretion rate	[1]	3.30%	3.30%	3.20%
Projected crediting rate	[2]	3.80%	3.80%	3.60%

[1] The interest accretion rate is determined by using the weighted-average policyholder crediting rates for the underlying policies over the period in-force, and based on the adjusted beginning balance, is used to measure the amount of interest accrual.

[2] The projected crediting rate is determined by using a future crediting rate curve that utilizes a portfolio approach reflecting anticipated reinvestment activity and runoff of existing assets over the projection period. The projected crediting rate is used to discount future assessments and excess benefits.