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DERIVATIVE INSTRUMENTS Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivative [Line Items]
Interest Rate Derivatives, at Fair Value, Net	$ 11
Energy Hedges [Member]
Derivative [Line Items]
Proceeds from Hedge, Investing Activities	27	$ 12
Payments for (Proceeds from) Hedge, Investing Activities	0	$ 1
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	200
Fair Value, Inputs, Level 2 [Member] \| Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Liability	11		$ 2
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member] \| Energy Hedges [Member]
Derivative [Line Items]
Derivative Asset	$ 13