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Income Taxes And Tax-Related Items Income Taxes And Tax-Related Items (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Income before income taxes $ 1,500  
Foreign-source income 25  
Liability for tax-related interest and penalties 6 $ 6
Unrecognized tax benefits that would impact the effective tax rate 14 15
Deferred Tax Assets, Operating Loss Carryforwards, Federal 3  
Deferred Tax Assets, Operating Loss Carryforwards, State 3 3
Deferred tax assets, federal valuation allowance 3  
Deferred tax assets, state valuation allowance $ 2 $ 3
Minimum    
Operating Loss Carryforwards, Expiration Date - Federal 2028  
Operating Loss Carryforwards, Expiration Date - State 2022  
Maximum    
Operating Loss Carryforwards, Expiration Date - Federal 2030  
Operating Loss Carryforwards, Expiration Date - State 2030