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Income Taxes And Tax-Related Items Income Taxes And Tax-Related Items (Narrative) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Unrecognized tax benefits $ 19 $ 18
Unrecognized Tax Benefits, Change Resulting from Settlements with Taxing Authorities 5  
Tax-related interest and penalties payable 6 6
Net deferred tax assets 566 9
Increase (Decrease) in Deferred Tax Assets 557  
State net operating loss carryforwards 3 3
Deferred Tax Assets, Operating Loss Carryforwards, Federal 3 3
Deferred tax assets, federal valuation allowance 3 3
Deferred tax assets, state valuation allowance $ 2 $ 2
Minimum    
Operating loss carryforwards, expiration date - State 2022  
Operating loss carryforwards, expiration date - Federal 2028  
Maximum    
Operating loss carryforwards, expiration date - State 2031  
Operating loss carryforwards, expiration date - Federal 2030