Unaudited Interim Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Fixed Maturities, Available-for-sale, allowance for credit losses	$ 4,810	$ 4,149
Fixed Maturities, Available-for-sale, amortized cost	16,197,708	12,737,749
Fixed maturities, trading, amortized cost	2,352,770	3,319,660
Equity securities, at cost	238,300	106,174
Commercial mortgage and other loans, allowance for credit losses	9,924	5,951
Other invested assets, at fair value	$ 114,134	$ 348,004
Common Stock, Par or Stated Value Per Share	$ 10	$ 10
Common Stock, Shares Authorized	1,000,000	1,000,000
Common Stock, Shares, Issued	250,000	250,000
Common Stock, Shares, Outstanding	250,000	250,000