DAC, VOBA, DSI, and DFEL (DAC) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	$ 246	$ 241
UL and Other [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	5,518	5,269	$ 5,269
Deferrals	119		537
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(72)		(288)
Balance as of end-of-year	5,565		5,518
Traditional Life [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	1,286	1,146	1,146
Deferrals	55		266
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(35)		(126)
Balance as of end-of-year	1,306		1,286
Fixed Annuities [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	439	448	448
Deferrals	14		60
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(17)		(69)
Balance as of end-of-year	436		439
Retirement Plan Services Segment [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	241	239	239
Deferrals	6		21
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(5)		(19)
Balance as of end-of-year	242		241
Group Protection Segment [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	141	140	140
Deferrals	25		98
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(24)		(97)
Balance as of end-of-year	142		141
Variable Annuities [Member]
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	3,880	$ 3,860	3,860
Deferrals	85		390
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(93)		(370)
Balance as of end-of-year	$ 3,872		$ 3,880