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Taxes on Income (Composition) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Notes to Consolidated Financial Statements [Abstract]      
Current taxes $ 70 $ 91 $ 53
Deferred taxes (43) 61 76
Taxes in respect of prior years (2) (5) 0
Income taxes $ 25 $ 147 $ 129