Certain Long-Duration Contracts with Guarantees (Liabilities for Guarantee Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Beginning balance	$ 19,487,744	$ 23,179,710	$ 16,407,407
Incurred guarantee benefits	(2,146,863)	(3,104,965)	6,185,375
Paid guarantee benefits	(264,730)	(213,847)	(165,619)
Change in unrealized investment gains and losses	(2,507,873)	(373,154)	752,547
Ending balance	14,568,278	19,487,744	23,179,710
GMDB | Annuity Contracts
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Beginning balance	487,531	569,063	460,501
Incurred guarantee benefits	100,830	(10,596)	114,878
Paid guarantee benefits	(62,461)	(24,394)	(37,804)
Change in unrealized investment gains and losses	(9,129)	(46,542)	31,488
Ending balance	516,771	487,531	569,063
GMDB | Variable Life, Variable Universal Life & Universal Life
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Beginning balance	9,937,143	9,363,585	7,400,233
Incurred guarantee benefits	2,260,795	1,089,139	1,368,759
Paid guarantee benefits	(200,877)	(189,453)	(126,148)
Change in unrealized investment gains and losses	(2,498,668)	(326,128)	720,741
Ending balance	9,498,393	9,937,143	9,363,585
GMIB | Annuity Contracts
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Beginning balance	15,114	19,248	17,107
Incurred guarantee benefits	(1,279)	(3,650)	3,490
Paid guarantee benefits	(1,392)	0	(1,667)
Change in unrealized investment gains and losses	(76)	(484)	318
Ending balance	12,367	15,114	19,248
GMWB/GMIWB/ GMAB | Annuity Contracts
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Beginning balance	9,047,956	13,227,814	8,529,566
Incurred guarantee benefits	(4,507,209)	(4,179,858)	4,698,248
Paid guarantee benefits	0	0	0
Change in unrealized investment gains and losses	0	0	0
Ending balance	$ 4,540,747	$ 9,047,956	$ 13,227,814