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Operating Segments (Non Current Assets by Geographical Location of the Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of geographical areas [Line Items]    
Non-current assets $ 5,567 $ 5,484
Israel [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets 3,570 3,387
Europe [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets 1,228 1,227
Asia [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets 401 455
North America [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets 309 321
Others [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets $ 59 $ 94