Other Contract Holder Funds - Rollforward of Other Contract Holder Funds (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Payout Annuity
Policyholder Account Balance [Roll Forward]
Balance as of beginning of year	$ 860	$ 837
Deposits	165	202
Surrenders, withdrawals and benefits	(194)	(231)
Net transfers from (to) separate accounts	0	0
Investment performance / change in value of equity option	0	0
Interest credited	21	25
Policy charges and other	0	27
Balance as of ending of year	852	860
Variable Annuity
Policyholder Account Balance [Roll Forward]
Balance as of beginning of year	8,396	10,259
Deposits	544	995
Surrenders, withdrawals and benefits	(1,596)	(1,788)
Net transfers from (to) separate accounts	51	(1,256)
Investment performance / change in value of equity option	0	0
Interest credited	171	273
Policy charges and other	(57)	(87)
Balance as of ending of year	7,509	8,396
Fixed Annuity
Policyholder Account Balance [Roll Forward]
Balance as of beginning of year	9,736	11,696
Deposits	1,080	234
Surrenders, withdrawals and benefits	(1,339)	(2,406)
Net transfers from (to) separate accounts	0	0
Investment performance / change in value of equity option	0	0
Interest credited	233	342
Policy charges and other	(117)	(130)
Balance as of ending of year	9,593	9,736
Fixed Indexed Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning of year	10,243	11,787
Deposits	127	211
Surrenders, withdrawals and benefits	(1,610)	(1,954)
Net transfers from (to) separate accounts	0	0
Investment performance / change in value of equity option	108	51
Interest credited	135	210
Policy charges and other	(13)	(62)
Balance as of ending of year	8,990	10,243
RILA
Policyholder Account Balance [Roll Forward]
Balance as of beginning of year	5,219	1,875
Deposits	4,187	2,890
Surrenders, withdrawals and benefits	(130)	(70)
Net transfers from (to) separate accounts	0	0
Investment performance / change in value of equity option	950	509
Interest credited	24	14
Policy charges and other	0	1
Balance as of ending of year	10,250	5,219
Closed Block Life
Policyholder Account Balance [Roll Forward]
Balance as of beginning of year	11,039	11,215
Deposits	218	307
Surrenders, withdrawals and benefits	(462)	(738)
Net transfers from (to) separate accounts	0	0
Investment performance / change in value of equity option	0	0
Interest credited	455	730
Policy charges and other	(366)	(475)
Balance as of ending of year	10,884	11,039
Closed Block Annuity
Policyholder Account Balance [Roll Forward]
Balance as of beginning of year	1,252	1,319
Deposits	3	4
Surrenders, withdrawals and benefits	(125)	(115)
Net transfers from (to) separate accounts	0	0
Investment performance / change in value of equity option	0	0
Interest credited	33	44
Policy charges and other	0	0
Balance as of ending of year	1,163	1,252
Total
Policyholder Account Balance [Roll Forward]
Balance as of beginning of year	46,745	48,988
Deposits	6,324	4,843
Surrenders, withdrawals and benefits	(5,456)	(7,302)
Net transfers from (to) separate accounts	51	(1,256)
Investment performance / change in value of equity option	1,058	560
Interest credited	1,072	1,638
Policy charges and other	(553)	(726)
Balance as of ending of year	$ 49,241	$ 46,745