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Taxes on Income (Deferred Taxes by Currency) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Deferred income taxes [Line Items]      
Deferred income taxes $ (232) $ (175) $ (96)
Euro [Member]      
Deferred income taxes [Line Items]      
Deferred income taxes 44 22  
British Pound [Member]      
Deferred income taxes [Line Items]      
Deferred income taxes 16 21  
US Dollar [Member]      
Deferred income taxes [Line Items]      
Deferred income taxes (1) (7)  
Israeli Shekel [Member]      
Deferred income taxes [Line Items]      
Deferred income taxes (285) (204)  
Other [Member]      
Deferred income taxes [Line Items]      
Deferred income taxes $ (6) $ (7)