SUPPLEMENTARY INFORMATION SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Interest, net of amounts capitalized	$ 37	$ 37	$ 37
Income taxes	$ 136	$ 269	$ 254