EQUITY METHOD INVESTMENTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 188	$ 167
Operating revenue	1,904	1,870	$ 1,868
Equity Method Investments [Member] | Dublin EfW (Ireland)
Schedule of Equity Method Investments [Line Items]
Operating revenue	$ 31	$ 30