Segment and Other Operating Information - Balance Sheet Items (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total segment assets	$ 13,302,369	$ 14,330,189
Other policyholder liabilities	142,181	134,338
Funds withheld liability	1,208,219	1,485,267
Segments
Segment Reporting Information [Line Items]
Deferred transaction costs	1,239,064	892,160
Total segment assets	12,555,175	13,426,665
Future policy benefits	9,691,200	9,912,987
Other policyholder liabilities	142,181	134,338
Funds withheld liability	1,208,219	1,485,267
Segments | Domestic Life Insurance
Segment Reporting Information [Line Items]
Deferred transaction costs	226,309	150,688
Total segment assets	1,664,706	1,791,017
Future policy benefits	1,469,661	1,537,482
Other policyholder liabilities	21,174	20,950
Funds withheld liability	0	0
Segments | International Life Insurance
Segment Reporting Information [Line Items]
Deferred transaction costs	252,411	152,340
Total segment assets	1,036,021	975,942
Future policy benefits	774,622	749,537
Other policyholder liabilities	15,646	14,268
Funds withheld liability	0	0
Segments | Annuities
Segment Reporting Information [Line Items]
Deferred transaction costs	597,292	423,318
Total segment assets	8,493,969	9,187,610
Future policy benefits	6,658,366	6,843,457
Other policyholder liabilities	90,927	82,650
Funds withheld liability	1,208,219	1,485,267
Segments | ONL & Affiliates
Segment Reporting Information [Line Items]
Deferred transaction costs	163,052	165,814
Total segment assets	1,017,599	1,115,380
Future policy benefits	788,551	782,511
Other policyholder liabilities	14,434	16,470
Funds withheld liability	0	0
Segments | All Others
Segment Reporting Information [Line Items]
Deferred transaction costs	0	0
Total segment assets	342,880	356,716
Future policy benefits	0	0
Other policyholder liabilities	0	0
Funds withheld liability	$ 0	$ 0