Segment Information - Reconciliation of Net Investment Income from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net investment income	$ 5,525	$ 5,879	$ 5,515
Operating Segments | Annuities
Segment Reporting Information [Line Items]
Net investment income	1,636	1,668	1,463
Operating Segments | Life Insurance
Segment Reporting Information [Line Items]
Net investment income	2,434	2,712	2,587
Operating Segments | Group Protection
Segment Reporting Information [Line Items]
Net investment income	348	339	334
Operating Segments | Retirement Plan Services
Segment Reporting Information [Line Items]
Net investment income	997	1,012	976
Other Operations
Segment Reporting Information [Line Items]
Net investment income	$ 110	$ 148	$ 155