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Taxes on Income (Composition) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Notes to Consolidated Financial Statements [Abstract]      
Current taxes $ 53 $ 208 $ 68
Deferred taxes 76 (23) (45)
Taxes in respect of prior years 0 (27) 32
Income taxes $ 129 $ 158 $ 55