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Operating Segments (Sales by Geographical Location of the Customer) (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
% of sales 100.00% 100.00% 100.00%
USA [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 903 $ 1,091 $ 1,070
% of sales 16.00% 20.00% 20.00%
China [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 848 $ 724 $ 669
% of sales 15.00% 13.00% 12.00%
Brazil [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 656 $ 594 $ 521
% of sales 12.00% 11.00% 10.00%
Germany [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 365 $ 378 $ 392
% of sales 7.00% 7.00% 7.00%
United Kingdom [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 382 $ 328 $ 306
% of sales 7.00% 6.00% 6.00%
Spain [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 262 $ 264 $ 258
% of sales 5.00% 5.00% 5.00%
Israel [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 223 $ 171 $ 237
% of sales 4.00% 3.00% 4.00%
France [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 267 $ 265 $ 226
% of sales 5.00% 5.00% 4.00%
India [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 211 $ 200 $ 199
% of sales 4.00% 4.00% 4.00%
Australia [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 126 $ 85 $ 187
% of sales 2.00% 2.00% 3.00%
All others [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 1,313 $ 1,318 $ 1,298
% of sales 23.00% 24.00% 25.00%