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	$ 372,413	$ 334,331
Other Operations
Segment Reporting Information [Line Items]
Total assets	21,375	20,631
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Total assets	185,599	167,434
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Total assets	108,932	94,568
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Total assets	9,714	9,784
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Total assets	$ 46,793	$ 41,914