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Basis Of Presentation Recently Adopted Accounting Pronouncements (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Jan. 01, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Long-term debt $ 2,899 $ 3,005 $ 2,940    
Deferred income taxes 329 336 353    
Liabilities 4,700 5,066 5,018    
Additional paid-in capital 4,886 4,894 4,947    
Accumulated deficit (2,684) (2,707) (2,712)    
Stockholders' Equity Attributable to Parent 2,154 2,138 2,186    
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 2,157 2,144 2,192 $ 1,797 $ 1,767
Liabilities and Equity $ 6,857 7,210 $ 7,210    
Accounting Standards Update 2020-06          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Long-term debt   65      
Deferred income taxes   (17)      
Liabilities   48      
Additional paid-in capital   (53)      
Accumulated deficit   5      
Stockholders' Equity Attributable to Parent   (48)      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest   (48)      
Liabilities and Equity   $ 0