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Operating Segments (Sales 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]      
Sales $ 5,556 $ 5,418 $ 5,363
Israel [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 2,841 2,548 2,470
Europe [Member]      
Disclosure of geographical areas [Line Items]      
Sales 1,970 1,918 1,863
Europe [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 2,198 2,119 2,124
Asia [Member]      
Disclosure of geographical areas [Line Items]      
Sales 1,488 1,342 1,275
Asia [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 617 583 556
North America [Member]      
Disclosure of geographical areas [Line Items]      
Sales 978 1,175 1,141
North America [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 831 1,045 1,045
Others [Member]      
Disclosure of geographical areas [Line Items]      
Sales 408 317 496
Others [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 211 215 218
Subtotal [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 6,698 6,510 6,413
Intercompany sales [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales (1,142) (1,092) (1,050)
South America [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 712 $ 666 $ 588