SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Income and mining taxes paid, net of refunds	$ 400	$ 437	$ 429
Interest paid, net of amounts capitalized	$ 261	$ 273	$ 188