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DERIVATIVE INSTRUMENTS Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Interest Rate Derivatives, at Fair Value, Net	$ 3
Energy Hedges [Member]
Derivative [Line Items]
Proceeds from Hedge, Investing Activities	16	$ 8
Payments for (Proceeds from) Hedge, Investing Activities	1	$ 17
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	150
Fair Value, Inputs, Level 2 [Member] \| Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Liability	$ 3		$ 0