Segment Information - Reconciliation of Net Investment Income from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net investment income	$ 5,712	$ 5,274	$ 5,839
Other Operations
Segment Reporting Information [Line Items]
Net investment income	118	124	125
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Net investment income	1,744	1,387	1,314
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Net investment income	2,515	2,464	3,054
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Net investment income	336	333	364
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Net investment income	$ 999	$ 966	$ 982