DAC, VOBA, DSI, And DFEL (Reconciliation Of DEFL) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Changes in DFEL [Abstract]
DFEL	$ 5,653	$ 5,052
UL and Other [Member]
Changes in DFEL [Abstract]
DFEL	5,373	4,766	$ 3,934
Variable Annuities [Member]
Changes in DFEL [Abstract]
DFEL	$ 280	$ 286	$ 291