DAC, VOBA, DSI, and DFEL (DAC) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Traditional Life [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	$ 1,333	$ 1,195
Deferrals	55	266
Amortization	(36)	(128)
Balance as of end-of-year	1,352	1,333
UL and Other [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	5,605	5,360
Deferrals	118	539
Amortization	(73)	(294)
Balance as of end-of-year	5,650	5,605
Retirement Plan Services [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	236	235
Deferrals	6	20
Amortization	(5)	(19)
Balance as of end-of-year	237	236
Group Protection [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	141	140
Deferrals	25	98
Amortization	(24)	(97)
Balance as of end-of-year	142	141
Variable Annuities [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	3,751	3,717
Deferrals	84	391
Amortization	(90)	(357)
Balance as of end-of-year	3,745	3,751
Fixed Annuities [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	439	448
Deferrals	14	60
Amortization	(17)	(69)
Balance as of end-of-year	$ 436	$ 439