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Financial Instruments and Risk Management (Liquidity Risk) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Short term debt (not including current maturities) $ 577 $ 679
Trade payables 1,064 740
Other current liabilities 912 704
Long-term debt, debentures and others 2,436 2,053
Not past due [Member] | Non-derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Short term debt (not including current maturities) 327 296
Trade payables 1,064 740
Other current liabilities 153 156
Long-term debt, debentures and others 2,735 2,489
Non-derivatives financial liabilities 4,279 3,681
Not past due [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   84
Not past due [Member] | Foreign currency and interest derivative designated as economic hedge [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   55
Not past due [Member] | Foreign currency and interest derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities 10  
Not past due [Member] | Energy and marine transport derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   1
Not past due [Member] | Foreign currency and interest derivative designated as cash flow hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   28
12 months or less [Member] | Non-derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Short term debt (not including current maturities) 329 299
Trade payables 1,064 740
Other current liabilities 153 156
Long-term debt, debentures and others 352 489
Non-derivatives financial liabilities 1,898 1,684
12 months or less [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   43
12 months or less [Member] | Foreign currency and interest derivative designated as economic hedge [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   42
12 months or less [Member] | Foreign currency and interest derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities 3  
12 months or less [Member] | Energy and marine transport derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   1
12 months or less [Member] | Foreign currency and interest derivative designated as cash flow hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities 0  
Second year [Member] | Non-derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Short term debt (not including current maturities) 0 0
Trade payables 0 0
Other current liabilities 0 0
Long-term debt, debentures and others 1,003 529
Non-derivatives financial liabilities 1,003 529
Second year [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   0
Second year [Member] | Foreign currency and interest derivative designated as economic hedge [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   0
Second year [Member] | Foreign currency and interest derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities 0  
Second year [Member] | Energy and marine transport derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   0
Second year [Member] | Foreign currency and interest derivative designated as cash flow hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   0
3-5 years [Member] | Non-derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Short term debt (not including current maturities) 0 0
Trade payables 0 0
Other current liabilities 0 0
Long-term debt, debentures and others 799 859
Non-derivatives financial liabilities 799 859
3-5 years [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   0
3-5 years [Member] | Foreign currency and interest derivative designated as economic hedge [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   0
3-5 years [Member] | Foreign currency and interest derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities 7  
3-5 years [Member] | Energy and marine transport derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   0
3-5 years [Member] | Foreign currency and interest derivative designated as cash flow hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   0
Sixth year and thereafter [Member] | Non-derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Short term debt (not including current maturities) 0 0
Trade payables 0 0
Other current liabilities 0 0
Long-term debt, debentures and others 1,532 1,559
Non-derivatives financial liabilities 1,532 1,559
Sixth year and thereafter [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   41
Sixth year and thereafter [Member] | Foreign currency and interest derivative designated as economic hedge [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   13
Sixth year and thereafter [Member] | Foreign currency and interest derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities $ 0  
Sixth year and thereafter [Member] | Energy and marine transport derivative designated as economic hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   0
Sixth year and thereafter [Member] | Foreign currency and interest derivative designated as cash flow hedge [Member] | Derivative instruments [Member]    
Disclosure of risk management strategy related to hedge accounting [Line Items]    
Derivatives financial liabilities   $ 28