MRBs - Reconciles of MRBs Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Market Risk Benefit [Line Items]
Assets	$ 3,894	$ 2,807
Liabilities	1,716	2,078
Net (Assets) Liabilities	(2,178)	(729)		$ 5,334
Variable Annuities
Market Risk Benefit [Line Items]
Assets	3,763	2,666
Liabilities	1,583	2,004
Net (Assets) Liabilities	(2,180)	(662)	$ 2,398	5,207
Fixed Annuities
Market Risk Benefit [Line Items]
Assets	96	117
Liabilities	128	72
Net (Assets) Liabilities	32	(45)	114	$ 118
Retirement Plan Services
Market Risk Benefit [Line Items]
Assets	35	24
Liabilities	5	2
Net (Assets) Liabilities	$ (30)	$ (22)	$ (1)