FINANCIAL INSTRUMENTS (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		18 Months Ended
	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2015	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2014
Retired in Q1 2016 [Member]
Derivative [Line Items]
Debt instrument, face amount		$ 200
Retired in Q1 and Q2 2015 [Member]
Derivative [Line Items]
Debt instrument, face amount						$ 1,300
Forward Starting Interest Rate Swaps [Member]
Derivative [Line Items]
Gain (loss) on derivatives				$ (17)
Treasury Lock [Member]
Derivative [Line Items]
Gain (loss) on derivatives	$ 3
Cash Flow Hedging [Member]
Derivative [Line Items]
Accumulated net loss from designated or qualifying cash flow hedges		11			$ 12
Net amount of deferred gains and losses on cash flow hedges that is expected to be reclassified within the next 12 months		3
Cash Flow Hedging [Member] | Forward Starting Interest Rate Swaps [Member]
Derivative [Line Items]
Notional amount of interest rate derivatives							$ 150
Cash Flow Hedging [Member] | Treasury Lock [Member]
Derivative [Line Items]
Notional amount of interest rate derivatives	350		$ 350	350
Economic Hedges [Member] | Reverse Treasury Locks [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 280	75	280	$ 280
Economic Hedges [Member] | Reverse Treasury Locks [Member] | Not Designated as Hedging Instrument [Member] | Other Nonoperating Income (Expense) [Member]
Derivative [Line Items]
Gain on derivative		$ 1	$ 3