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Operating Segments (Non Current Assets by Geographical Location of the Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure of geographical areas [Line Items]    
Non-current assets $ 6,399 $ 6,128
Israel [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets 3,952 3,905
Europe [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets 1,575 1,380
Asia [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets 490 434
North America [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets 319 333
Others [Member]    
Disclosure of geographical areas [Line Items]    
Non-current assets $ 63 $ 76