Business and Basis of Presentation (Unaudited Interim Statement of Financial Position) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jul. 01, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Total investments		$ 13,403,656		$ 13,403,656		$ 20,501,000	$ 22,901,456
Cash and cash equivalents		1,413,331		1,413,331		2,091,000	1,069,211
Deferred policy acquisition costs		1,000,868		1,000,868		4,215,000	4,237,780
Accrued investment income		74,015		74,015		110,000	121,604
Reinsurance recoverables		384,614		384,614		567,000	694,040
Income tax receivable		1,088,488		1,088,488		1,707,000	1,448,714
Value of business acquired		27,186		27,186		28,000	27,247
Deferred sales inducements		294,029		294,029		692,000	714,598
Receivables from parent and affiliates		54,706		54,706		114,000	87,620
Other assets		550,440		550,440		544,000	767,540
Separate account assets		31,916,178		31,916,178		32,934,000	32,205,296
TOTAL ASSETS		50,207,511		50,207,511		63,503,000	64,275,106
LIABILITIES
Future policy benefits						13,707,000
Policyholder Account Balance						12,617,000
Payables to parent and affiliates		329,775		329,775		34,000	47,345
Long-term debt		0		0		300,000	299,747
Reinsurance payables		31,437		31,437		148,000	178,860
Other liabilities		503,550		503,550		805,000	980,692
Separate account liabilities		31,916,178		31,916,178		32,934,000	32,205,296
Total Liabilities		48,150,543		48,150,543		60,545,000	61,573,961
EQUITY
Common stock		2,500		2,500		3,000	2,500
Additional paid-in capital		590,601		590,601		4,383,000	4,382,936
Retained earnings		1,178,953		1,178,953		(1,782,000)	(3,217,350)
Accumulated other comprehensive income		284,914		284,914		354,000	1,533,059
Total equity		2,056,968		2,056,968		2,958,000	2,701,145
TOTAL LIABILITIES AND EQUITY		50,207,511		50,207,511		$ 63,503,000	$ 64,275,106
Increase related to ceding commissions		$ 106,137	$ 489,440	$ 1,127,868	$ 1,441,991
Impacts of recapture
ASSETS
Total investments	$ 12,174,000
Cash and cash equivalents	1,682,000
Deferred policy acquisition costs	929,000
Accrued investment income	68,000
Reinsurance recoverables	386,000
Income tax receivable	920,000
Value of business acquired	28,000
Deferred sales inducements	304,000
Receivables from parent and affiliates	73,000
Other assets	544,000
Separate account assets	32,934,000
TOTAL ASSETS	50,042,000
LIABILITIES
Future policy benefits	4,659,000
Policyholder Account Balance	9,418,000
Payables to parent and affiliates	34,000
Long-term debt	300,000
Reinsurance payables	33,000
Other liabilities	560,000
Separate account liabilities	32,934,000
Total Liabilities	47,938,000
EQUITY
Common stock	3,000
Additional paid-in capital	597,000
Retained earnings	1,244,000
Accumulated other comprehensive income	260,000
Total equity	2,104,000
TOTAL LIABILITIES AND EQUITY	50,042,000
Variable annuity | Total investments
EQUITY
Increase related to ceding commissions	2,000,000
Variable annuity | PAI | Additional paid-in capital
EQUITY
Non-cash activities	3,400,000
Variable annuity | Impacts of recapture
ASSETS
Total investments	(8,327,000)
Cash and cash equivalents	(409,000)
Deferred policy acquisition costs	(3,286,000)
Accrued investment income	(42,000)
Reinsurance recoverables	(181,000)
Income tax receivable	(787,000)
Value of business acquired	0
Deferred sales inducements	(388,000)
Receivables from parent and affiliates	(41,000)
Other assets	0
Separate account assets	0
TOTAL ASSETS	(13,461,000)
LIABILITIES
Future policy benefits	(9,048,000)
Policyholder Account Balance	(3,199,000)
Payables to parent and affiliates	0
Long-term debt	0
Reinsurance payables	(115,000)
Other liabilities	(245,000)
Separate account liabilities	0
Total Liabilities	(12,607,000)
EQUITY
Common stock	0
Additional paid-in capital	(3,786,000)
Retained earnings	3,026,000
Accumulated other comprehensive income	(94,000)
Total equity	(854,000)
TOTAL LIABILITIES AND EQUITY	(13,461,000)
Variable annuity | Impacts of recapture | Total investments
EQUITY
Non-cash activities	$ (8,300,000)