Segment Information - Reconciliation of Assets from Segments to Consolidated (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total assets	$ 373,976	$ 335,582
Other Operations
Segment Reporting Information [Line Items]
Total assets	23,021	20,461
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Total assets	186,716	165,643
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Total assets	107,529	97,373
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Total assets	9,741	9,830
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Total assets	$ 46,969	$ 42,275