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Basis of Presentation (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Jul. 30, 2021
Dec. 31, 2020
Apr. 30, 2020
Debt Instrument [Line Items]                
Line of credit balance   $ 13,509,000,000   $ 13,509,000,000        
Immaterial amount and a loss       0 $ 5,000,000      
Investments   70,000,000   70,000,000     $ 63,000,000  
Equity method investment   6,000,000 $ 3,000,000 8,000,000 4,000,000      
Equity securities without readily determinable fair value, amount   8,000,000   8,000,000     $ 8,000,000  
Royalty fee                
Debt Instrument [Line Items]                
Revenue   $ 34,000,000 $ 30,000,000 93,000,000 $ 84,000,000      
Disposed of by Sale                
Debt Instrument [Line Items]                
Amount of consideration received $ 4,000,000              
Disposed of by Sale | Assets In Argentina                
Debt Instrument [Line Items]                
Consideration, rights to operate period 2 years              
Loss on sale       14,000,000        
Severance costs       $ 1,000,000        
Term loan                
Debt Instrument [Line Items]                
Long-term debt               $ 1,200,000,000
Line of Credit | Revolving Credit Facility                
Debt Instrument [Line Items]                
Line of credit balance           $ 1,950,000,000   $ 1,800,000,000