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Operating Segments (Sales 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]      
Sales $ 5,271 $ 5,556 $ 5,418
Israel [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 2,815 2,841 2,548
Europe [Member]      
Disclosure of geographical areas [Line Items]      
Sales 1,885 1,970 1,918
Europe [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 2,079 2,198 2,119
Asia [Member]      
Disclosure of geographical areas [Line Items]      
Sales 1,423 1,488 1,342
Asia [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 615 617 583
North America [Member]      
Disclosure of geographical areas [Line Items]      
Sales 910 978 1,175
North America [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 816 831 1,045
Others [Member]      
Disclosure of geographical areas [Line Items]      
Sales 385 408 317
Others [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 47 48 48
Subtotal [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales 6,813 6,698 6,510
Intercompany sales [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales (1,542) (1,142) (1,092)
South America [Member]      
Disclosure of geographical areas [Line Items]      
Sales 668 712 666
South America [Member] | Assets [Domain]      
Disclosure of geographical areas [Line Items]      
Sales $ 441 $ 163 $ 167