DAC, VOBA, DSI, and DFEL - Reconciliation of DAC, VOBA and DSI (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 12,405	$ 12,397
Traditional Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	1,411	1,418
UL and Other
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	6,246	6,232
Group Protection
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	157	154
Retirement Plan Services
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	273	265
Variable Annuities
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	3,871	3,873
Fixed Annuities
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 447	$ 455