DAC, VOBA, DSI, And DFEL (DSI) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
UL and Other [Member]
Changes in DSI [Roll Forward]
Balance as of beginning-of-year	$ 30	$ 31
Deferrals	1	1
Amortization	(2)	(2)
Balance as of end-of-year/period	29	30
Retirement Plan Services [Member]
Changes in DSI [Roll Forward]
Balance as of beginning-of-year	17	14
Deferrals	5	4
Amortization		(1)
Balance as of end-of-year/period	22	17
Variable Annuities [Member]
Changes in DSI [Roll Forward]
Balance as of beginning-of-year	128	139
Deferrals	4	1
Amortization	(9)	(12)
Balance as of end-of-year/period	123	128
Fixed Annuities [Member]
Changes in DSI [Roll Forward]
Balance as of beginning-of-year	23	27
Amortization	(3)	(4)
Balance as of end-of-year/period	$ 20	$ 23