DAC, VOBA, DSI, And DFEL (DAC) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Traditional Life [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	$ 1,333	$ 1,195
Deferrals	148	266
Amortization	(108)	(128)
Balance as of end-of-year	1,373	1,333
UL and Other [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	5,605	5,360
Deferrals	346	539
Amortization	(221)	(294)
Balance as of end-of-year	5,730	5,605
Retirement Plan Services [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	236	235
Deferrals	16	20
Amortization	(14)	(19)
Balance as of end-of-year	238	236
Group Protection [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	141	140
Deferrals	79	98
Amortization	(73)	(97)
Balance as of end-of-year	147	141
Variable Annuities [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	3,751	3,717
Deferrals	269	391
Amortization	(272)	(357)
Balance as of end-of-year	3,748	3,751
Fixed Annuities [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	439	448
Deferrals	31	60
Amortization	(51)	(69)
Balance as of end-of-year	$ 419	$ 439