Business Segments - Assets by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and invested assets	$ 18,300,927	$ 22,850,154
Accrued investment income	259,581	251,307
Deferred acquisition costs	5,249,907	4,914,728	$ 4,595,444	$ 4,341,941
Goodwill	481,791	481,791
Other assets	1,244,953	1,270,068
Total assets	25,537,159	29,768,048
Corporate & Other
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and invested assets	0	0
Accrued investment income	0	0
Deferred acquisition costs	0	0
Goodwill	0	0
Other assets	1,244,953	1,270,068
Total assets	1,244,953	1,270,068
Life | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and invested assets	0	0
Accrued investment income	0	0
Deferred acquisition costs	4,517,577	4,236,401
Goodwill	309,609	309,609
Other assets	0	0
Total assets	4,827,186	4,546,010
Health | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and invested assets	0	0
Accrued investment income	0	0
Deferred acquisition costs	722,366	675,871
Goodwill	172,182	172,182
Other assets	0	0
Total assets	894,548	848,053
Annuity | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and invested assets	0	0
Accrued investment income	0	0
Deferred acquisition costs	9,964	2,456
Goodwill
Other assets	0	0
Total assets	9,964	2,456
Investment | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and invested assets	18,300,927	22,850,154
Accrued investment income	259,581	251,307
Deferred acquisition costs	0	0
Goodwill	0	0
Other assets	0	0
Total assets	$ 18,560,508	$ 23,101,461