MRBs (Reconciles of MRBs Assets and Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Market Risk Benefit [Line Items]
Market risk benefit assets	$ 3,906	$ 2,807
Market risk benefit liabilities	1,548	2,078
Net (Asset) Liability	(2,358)	(729)
Fixed Annuities [Member]
Market Risk Benefit [Line Items]
Market risk benefit assets	116	117
Market risk benefit liabilities	82	72
Net (Asset) Liability	(34)	(45)	$ 114
Retirement Plan Services Segment [Member]
Market Risk Benefit [Line Items]
Market risk benefit assets	34	24
Market risk benefit liabilities	6	2
Net (Asset) Liability	(28)	(22)	(1)
Variable Annuities [Member]
Market Risk Benefit [Line Items]
Market risk benefit assets	3,756	2,666
Market risk benefit liabilities	1,460	2,004
Net (Asset) Liability	$ (2,296)	$ (662)	$ 2,398