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FINANCIAL INSTRUMENTS (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended | 18 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2015 | Jun. 30, 2015 | Dec. 31, 2015 | Mar. 31, 2015 | Mar. 15, 2015 | Dec. 31, 2014 | Mar. 31, 2014 | Jul. 24, 2012
To be Retired in Q1 and Q2 2015 [Member] |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Face amount of debt |  | $ 1,300 |  |  |  |  |  |
Cash Flow Hedging [Member] |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Accumulated net loss from designated or qualifying cash flow hedges |  |  | $ 12 |  |  | $ 15 |  |
Net amount of deferred gains and losses on cash flow hedges that is expected to be reclassified within the next 12 months |  |  | 3 |  |  |  |  |
Forward Starting Interest Rate Swaps [Member] |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Gain (loss) on derivatives |  |  |  | $ (17) |  |  |  |
Forward Starting Interest Rate Swaps [Member] | Cash Flow Hedging [Member] |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  | $ 150 |
Treasury Lock [Member] |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Gain (loss) on derivatives | $ 3 |  |  |  |  |  |  |
Treasury Lock [Member] | Cash Flow Hedging [Member] |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount | $ 350 |  |  | $ 350 |  |  |  |
Interest Rate Swaps [Member] |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative asset designated as hedging instrument fair value on termination |  |  |  |  |  |  |  | $ 72
Amount to be amortized as a reduction of interest expense |  |  | $ 28 |  |  |  |  | $ 65
Reverse Treasury Locks [Member] | Economic Hedges [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  | $ 280 |  |  |
Reverse Treasury Locks [Member] | Economic Hedges [Member] | Not Designated as Hedging Instrument [Member] | Other Operating Income (Expense) [Member] |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative instruments not designated as hedging instruments, gain |  | $ 3 |  |  |  |  |  |

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- Definition Total gain or loss, net of tax expense or benefit recognized in accumulated other comprehensive income (loss) resulting from gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. + References No definition available. + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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