DAC, VOBA, DSI, and DFEL (Reconciliation of DAC, VOBA and DSI) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Changes in DAC [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 12,363	$ 12,263
UL and Other [Member]
Changes in DAC [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	6,099	6,002
Traditional Life [Member]
Changes in DAC [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	1,372	1,336
Fixed Annuities [Member]
Changes in DAC [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	454	479
Retirement Plan Services Segment [Member]
Changes in DAC [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	264	258
Group Protection Segment [Member]
Changes in DAC [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	147	141
Variable Annuities [Member]
Changes in DAC [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 4,027	$ 4,047