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RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES, Part 2 (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 USD ($) MMcf MMBbls | Dec. 31, 2017 USD ($) MMcf MMBbls
Derivative [Line Items] |  |
Senior Notes, Noncurrent | $ 1,250,000 |
Designated as Hedging Instrument [Member] | Futures and swaps | - Natural gas (Bcf) | Fixed price | Purchased/ Payor |  |
Derivative [Line Items] |  |
Notional Amount | MMcf | 0 | 0
Designated as Hedging Instrument [Member] | Futures and swaps | - Natural gas (Bcf) | Fixed price | Sold/ Receiver |  |
Derivative [Line Items] |  |
Notional Amount | MMcf | (24,000) | (24,500)
Designated as Hedging Instrument [Member] | Futures and swaps | - Natural gas (Bcf) | Basis | Purchased/ Payor |  |
Derivative [Line Items] |  |
Notional Amount | MMcf | 0 | 0
Designated as Hedging Instrument [Member] | Futures and swaps | - Natural gas (Bcf) | Basis | Sold/ Receiver |  |
Derivative [Line Items] |  |
Notional Amount | MMcf | (24,000) | (24,500)
Designated as Hedging Instrument [Member] | Futures, forwards and swaps | - Crude oil and NGLs (MMBbl) | Fixed price | Purchased/ Payor |  |
Derivative [Line Items] |  |
Notional Amount | MMBbls | 4.0 | 3.5
Designated as Hedging Instrument [Member] | Futures, forwards and swaps | - Crude oil and NGLs (MMBbl) | Fixed price | Sold/ Receiver |  |
Derivative [Line Items] |  |
Notional Amount | MMBbls | (11.6) | (11.1)
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Purchased/ Payor |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 1,750,000 | $ 1,750,000
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Sold/ Receiver |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 0 | $ 0
Not Designated as Hedging Instrument [Member] | Futures, forwards and swaps | - Crude oil and NGLs (MMBbl) | Fixed price | Purchased/ Payor |  |
Derivative [Line Items] |  |
Notional Amount | MMBbls | 0.4 | 0.8
Not Designated as Hedging Instrument [Member] | Futures, forwards and swaps | - Crude oil and NGLs (MMBbl) | Fixed price | Sold/ Receiver |  |
Derivative [Line Items] |  |
Notional Amount | MMBbls | (0.4) | (0.8)
LIBOR Based Interest Payments [Member] | Cash Flow Hedging [Member] | Forward Contracts [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Notional Amount Of Cash Flow Hedge Instruments Settled | $ 500,000 |
Derivative, Notional Amount |  | $ 500,000
Forecasted Debt Issuances [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount, New Contracts | 1,500,000 |
Notional Amount Of Cash Flow Hedge Instruments Settled | 1,000,000 |
Forecasted Debt Issuances [Member] | Cash Flow Hedging [Member] | Forward Contracts [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 1,800,000 | $ 1,300,000

X
- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + 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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- 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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