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Operating Segments (Operating Income-Loss by Geographical Location of the Assets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of geographical areas [Line Items]      
Operating income (loss) $ 1,519 $ 629 $ (3)
Israel [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) 526 475 304
Europe [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) 834 [1] (45) (117)
Asia [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) 52 8 (41)
North America [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) 74 154 83
Others [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) 29 33 (203)
Intercompany eliminations [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) $ 4 $ 4 $ (29)
[1] Europe profit for the year ended December 31, 2018 includes gain from divestiture of businesses in the amount of $841 million. For further information see Note 10.