Segment Information - Reconciliation of Assets from Segments to Consolidated (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total assets	$ 396,840	$ 372,413
Other Operations
Segment Reporting Information [Line Items]
Total assets	19,867	21,375
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Total assets	202,827	185,599
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Total assets	115,397	108,932
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Total assets	9,216	9,714
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Total assets	$ 49,533	$ 46,793