Income Taxes (Tax Carryforwards) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Tax Credit Carryforward [Line Items]
Tax Credit Carryforwards	$ 970
Tax Loss Carryforwards	2,141
Expiration Period Current To Five Years [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforwards	54
Tax Loss Carryforwards	292
Expiration Period Six To Ten Years [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforwards	73
Tax Loss Carryforwards	174
Expiration Period Eleven To Twenty Years [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforwards	337
Tax Loss Carryforwards	318
Expiration Period Indefinite [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforwards	506
Tax Loss Carryforwards	$ 1,357