REVENUES REVENUES - Geographic Information (Details) $ in Millions	12 Months Ended
Dec. 31, 2020 USD ($) customer	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Disclosure of geographical areas [line items]
Revenues	$ 1,430	$ 1,619	$ 1,561
Brazil
Disclosure of geographical areas [line items]
Revenues	942	1,141	1,112
United Kingdom
Disclosure of geographical areas [line items]
Revenues	$ 488	$ 478	$ 449
Customer Concentration Risk 1
Disclosure of geographical areas [line items]
Concentration risk, number of customers \| customer	1

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details