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Income Taxes And Tax-Related Items (Income Taxes And Tax-Related Items) (Narrative) (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Income Tax Contingency [Line Items]    
Unrecognized tax benefits $ 8  
Tax-related interest and penalties payable 1  
Net deferred tax assets 789 $ 1,000
Deferred Tax Assets, Other (206)  
Deferred tax assets, operating loss carryforwards, state and local 2  
Deferred tax assets, federal valuation allowance 6  
Deferred tax assets, state valuation allowance $ 1 $ 1
Minimum    
Income Tax Contingency [Line Items]    
Operating loss carryforwards, expiration date - federal 2028  
Operating loss carryforwards, expiration date - state 2024  
Maximum    
Income Tax Contingency [Line Items]    
Operating loss carryforwards, expiration date - federal 2034  
Operating loss carryforwards, expiration date - state 2042