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Credit from Banks and Others (Yearly movement in Credit from Banks and Others) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Notes to Consolidated Financial Statements [Abstract]      
Balance at the begining of the year $ 2,442 $ 3,227  
Receipt of long-term debt 657 1,746 $ 966
Repayment of long-term debt (689) (2,115) (1,387)
Repayment of short-term credit, net (183) (283) 147
Interest paid (115) (103) (111)
Implementation of IFRS 16 353 0  
Effect of changes in foreign exchange rates 48 (63)  
Other changes 46 33  
Balance at the end of the year $ 2,559 $ 2,442 $ 3,227