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REVENUES REVENUES (Geographic Information) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Disclosure of geographical areas [line items]        
Revenues $ 1,685 $ 1,044 $ 3,278 $ 2,057
BRAZIL        
Disclosure of geographical areas [line items]        
Revenues 289 278 578 583
AUSTRALIA        
Disclosure of geographical areas [line items]        
Revenues 270 288 539 572
COLOMBIA        
Disclosure of geographical areas [line items]        
Revenues 259 127 508 171
UNITED STATES        
Disclosure of geographical areas [line items]        
Revenues 249 42 461 83
CANADA        
Disclosure of geographical areas [line items]        
Revenues 233 47 505 124
UNITED KINGDOM        
Disclosure of geographical areas [line items]        
Revenues 171 166 333 325
INDIA        
Disclosure of geographical areas [line items]        
Revenues 112 11 152 24
CHILE        
Disclosure of geographical areas [line items]        
Revenues 42 43 84 88
PERU        
Disclosure of geographical areas [line items]        
Revenues 28 18 57 44
Aggregated Individually Immaterial Geographical Areas [Member]        
Disclosure of geographical areas [line items]        
Revenues $ 32 $ 24 $ 61 $ 43