DAC, VOBA, DSI, and DFEL - Reconciliation of DAC, VOBA and DSI (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 12,681	$ 12,537
Other Operations
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	7	0
Traditional Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	1,323	1,370
UL and Other
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	6,372	6,318
Group Protection
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	191	178
Retirement Plan Services
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	300	284
Variable Annuities
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	4,054	3,964
Fixed Annuities
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 434	$ 423