Segment Information - Reconciliation of Assets From Segments to Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 398,934	$ 373,976
Operating Segments | Life Insurance
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	112,686	107,529
Operating Segments | Annuities
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	204,946	186,716
Operating Segments | Group Protection (1)
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	13,943	9,741
Operating Segments | Retirement Plan Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	47,830	46,969
Other Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 19,529	$ 23,021