DAC, VOBA, DSI, and DFEL - Reconciliation of DAC, VOBA and DSI (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 12,397	$ 12,235	$ 12,104
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	1,418	1,383
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	6,232	6,100
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	154	141
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	265	253
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	3,873	3,879
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 455	$ 479