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Operating Segments (Sales by Geographical Location of the Customer) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of geographical areas [Line Items]      
Sales $ 5,043 $ 5,271 $ 5,556
% of sales 100.00% 100.00% 100.00%
USA [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 793 $ 840 $ 903
% of sales 16.00% 16.00% 16.00%
China [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 806 $ 802 $ 848
% of sales 16.00% 15.00% 15.00%
Brazil [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 447 $ 581 $ 656
% of sales 9.00% 11.00% 12.00%
United Kingdom [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 336 $ 347 $ 382
% of sales 7.00% 7.00% 7.00%
Germany [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 327 $ 334 $ 365
% of sales 6.00% 6.00% 7.00%
France [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 238 $ 257 $ 267
% of sales 5.00% 5.00% 5.00%
Spain [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 243 $ 249 $ 262
% of sales 5.00% 5.00% 5.00%
Israel [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 260 $ 241 $ 223
% of sales 5.00% 5.00% 4.00%
India [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 194 $ 178 $ 211
% of sales 4.00% 3.00% 4.00%
Italy [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 114 $ 116 $ 125
% of sales 2.00% 2.00% 2.00%
All others [Member]      
Disclosure of geographical areas [Line Items]      
Sales $ 1,285 $ 1,326 $ 1,314
% of sales 25.00% 25.00% 23.00%