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Operating Segments (Operating Income-Loss by Geographical Location of the Assets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of geographical areas [Line Items]      
Operating income (loss) $ 756 $ 1,519 $ 629
Israel [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) 578 526 475
Europe [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) [1] 32 834 (45)
Asia [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) 59 52 8
North America [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) 61 74 154
Others [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) 22 29 33
Intercompany eliminations [Member]      
Disclosure of geographical areas [Line Items]      
Operating income (loss) $ 4 $ 4 $ 4
[1] Europe operating income for 2018 includes gain from divestiture of businesses in the amount of $841 million. See Note 8B.