DERIVATIVE FINANCIAL INSTRUMENTS Fair Value on Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative Liability	$ 14	$ 11
Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liability	1	1
Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability	13	10
Interest Rate Contract
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	14	11
Interest Rate Contract | Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liability	1	1
Interest Rate Contract | Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability	13	10
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liability	10	8
Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liability		1
Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability	9	7
Designated as Hedging Instrument [Member] | Interest Rate Contract | Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liability		1
Designated as Hedging Instrument [Member] | Interest Rate Contract | Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability	9	7
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liability	4	3
Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liability	0
Not Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability	4	3
Not Designated as Hedging Instrument [Member] | Interest Rate Contract | Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liability	0
Not Designated as Hedging Instrument [Member] | Interest Rate Contract | Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability	$ 4	$ 3