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REVENUES REVENUES (Geographic Information) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disclosure of geographical areas [line items]        
Revenues $ 1,946 $ 1,685 $ 4,142 $ 3,278
UNITED STATES        
Disclosure of geographical areas [line items]        
Revenues 589 249 1,115 461
CANADA        
Disclosure of geographical areas [line items]        
Revenues 307 233 691 505
UNITED KINGDOM        
Disclosure of geographical areas [line items]        
Revenues 281 171 599 333
BRAZIL        
Disclosure of geographical areas [line items]        
Revenues 224 289 498 578
COLOMBIA        
Disclosure of geographical areas [line items]        
Revenues 172 259 394 508
AUSTRALIA        
Disclosure of geographical areas [line items]        
Revenues 245 270 454 539
INDIA        
Disclosure of geographical areas [line items]        
Revenues 83 112 206 152
CHILE        
Disclosure of geographical areas [line items]        
Revenues 21 42 55 84
PERU        
Disclosure of geographical areas [line items]        
Revenues 10 28 33 57
Aggregated Individually Immaterial Geographical Areas [Member]        
Disclosure of geographical areas [line items]        
Revenues $ 14 $ 32 $ 97 $ 61