Separate Accounts (Schedule of Reconciliation of Separate Account Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	$ 153,246	$ 143,536
Reinsurance Agreement [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	45	42
UL and Other [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	23,409	20,920	$ 24,785
Other Operations [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	50	47
Variable Annuities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	110,998	105,573	136,665
Retirement Plan Services Segment [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account liabilities	$ 18,789	$ 16,996	$ 21,068