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REVENUES REVENUES (Geographic Information) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Disclosure of geographical areas [line items]        
Revenues $ 2,663 $ 1,946 $ 5,346 $ 4,142
UNITED STATES        
Disclosure of geographical areas [line items]        
Revenues 644 589 1,384 1,115
CANADA        
Disclosure of geographical areas [line items]        
Revenues 411 307 835 691
INDIA        
Disclosure of geographical areas [line items]        
Revenues 420 83 805 206
UNITED KINGDOM        
Disclosure of geographical areas [line items]        
Revenues 381 281 756 599
BRAZIL        
Disclosure of geographical areas [line items]        
Revenues 295 224 568 498
COLOMBIA        
Disclosure of geographical areas [line items]        
Revenues 211 172 428 394
AUSTRALIA        
Disclosure of geographical areas [line items]        
Revenues 148 245 297 454
CHILE        
Disclosure of geographical areas [line items]        
Revenues 38 21 77 55
PERU        
Disclosure of geographical areas [line items]        
Revenues 23 10 46 33
Aggregated Individually Immaterial Geographical Areas [Member]        
Disclosure of geographical areas [line items]        
Revenues $ 92 $ 14 $ 150 $ 97