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REVENUES REVENUES (Geographic Information) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
customer
Jun. 30, 2020
USD ($)
Disclosure of geographical areas [line items]        
Revenues $ 416 $ 322 $ 815 $ 706
BRAZIL        
Disclosure of geographical areas [line items]        
Revenues 272 216 530 478
UNITED KINGDOM        
Disclosure of geographical areas [line items]        
Revenues 144 106 285 228
Partnership's Sales Revenue, Net [Member] | Customer Concentration Risk 1 [Member]        
Disclosure of geographical areas [line items]        
Revenues $ 272 $ 216 $ 530 $ 478
Concentration Risk, Number of Customers | customer     1  
Bottom of range [member] | Partnership's Sales Revenue, Net [Member] | Customer Concentration Risk 1 [Member]        
Disclosure of geographical areas [line items]        
Percentage of entity's revenue     10.00%