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Related and Interested Parties (Transactions with Related and Interested Parties) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Notes to Consolidated Financial Statements [Abstract]      
Sales $ 3 $ 4 $ 5
Cost of sales 3 8 19
Selling, transport and marketing expenses 7 10 7
Financing expenses (income), net (1) (1) 3
General and administrative expenses 1 1 1
Management fees to the parent company $ 1 $ 1 $ 1