SUPPLEMENTAL CASH FLOW INFORMATION (Cash Transactions) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]
Interest Paid, Net of Amounts Capitalized	$ 80	$ 67	$ 61
Income Tax Refunds	$ (14)	$ 0	$ 0