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Financial Instruments and Risk Management (Narratives) (Details)
shares in Millions, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
May 31, 2020
USD ($)
Jan. 31, 2020
USD ($)
Dec. 31, 2018
USD ($)
Disclosure of risk management strategy related to hedge accounting [Line Items]            
Amount annual additional deductible cumulative $ 6 $ 6        
LIBOR-based debt mature after the expected end date 30 $ 30        
Number of shares sold | shares   147        
Consideration received after sale of stock   $ 293        
Financial asset at amortized cost $ 0 $ 0 $ 66     $ 53
Hedging ratio 1:1 1:1        
Hedged instruments amount 230 230   109 110  
Average interest discount on debenture   2.50% 2.60%      
Israel, New Shekels            
Disclosure of risk management strategy related to hedge accounting [Line Items]            
Average interest discount on loan   1.50% 1.60%      
Euro Member Countries, Euro            
Disclosure of risk management strategy related to hedge accounting [Line Items]            
Average interest discount on loan   1.20% 1.40%      
Brazil, Brazil Real            
Disclosure of risk management strategy related to hedge accounting [Line Items]            
Average interest discount on loan   13.00%        
China, Yuan Renminbi            
Disclosure of risk management strategy related to hedge accounting [Line Items]            
Average interest discount on loan   4.00% 5.10%      
Current Assets [Member]            
Disclosure of risk management strategy related to hedge accounting [Line Items]            
Financial asset at amortized cost     $ 74      
Derivative instruments [Member]            
Disclosure of risk management strategy related to hedge accounting [Line Items]            
LIBOR-based debt $ 150 $ 150