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Basis Of Presentation Derivative Instruments (Details) - Interest Rate Swap - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Derivative [Line Items]          
Derivative, Notional Amount $ 450   $ 450    
Derivative Amount, Terminated 550   550    
Not Designated as Hedging Instrument          
Derivative [Line Items]          
Derivative, Gain (Loss) on Derivative, Net (5) $ (1) (40) $ (8)  
Not Designated as Hedging Instrument | Other Current Assets          
Derivative [Line Items]          
Other current assets 1   1   $ 0
Not Designated as Hedging Instrument | Other current and non-current liabilities          
Derivative [Line Items]          
Interest rate swap contract - other current and non-current liabilities $ 0   $ 0   $ 46