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RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES, Part 2 (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 USD ($) MMcf MMBbls | Dec. 31, 2018 USD ($) MMcf MMBbls
Derivative [Line Items] |  |
Notional Amount Of Cash Flow Hedge Instruments Settled | $ 1,800,000 |
Designated as Hedging Instrument [Member] | Futures and swaps | - Natural gas (Bcf) | Fixed price | Purchased/ Payor |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | MMcf | 0 | 0
Designated as Hedging Instrument [Member] | Futures and swaps | - Natural gas (Bcf) | Fixed price | Sold/ Receiver |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | MMcf | (39,600) | (29,900)
Designated as Hedging Instrument [Member] | Futures and swaps | - Natural gas (Bcf) | Basis | Purchased/ Payor |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | MMcf | 0 | 0
Designated as Hedging Instrument [Member] | Futures and swaps | - Natural gas (Bcf) | Basis | Sold/ Receiver |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | MMcf | (39,600) | (29,900)
Designated as Hedging Instrument [Member] | Futures, forwards, swaps and options | - Crude oil and NGLs (MMBbl) | Fixed price | Purchased/ Payor |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | MMBbls | 9.2 | 6.5
Designated as Hedging Instrument [Member] | Futures, forwards, swaps and options | - Crude oil and NGLs (MMBbl) | Fixed price | Sold/ Receiver |  |
Derivative [Line Items] |  |
Derivative, Nonmonetary Notional Amount | MMBbls | (20.1) | (13.8)
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Purchased/ Payor |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 3,100,000 | $ 4,300,000
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Sold/ Receiver |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 0 | 0
LIBOR Based Interest Payments [Member] | Cash Flow Hedging [Member] | Forward Contracts [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 1,300,000 | 1,300,000
Forecasted Debt Issuances [Member] | Cash Flow Hedging [Member] | Forward Contracts [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount, New Contracts | 625,000 |
Forecasted Debt Issuances [Member] | Cash Flow Hedging [Member] | Forward Contracts [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 1,800,000 | $ 3,000,000
Notes Payable from Public Offering Due 2029 and 2048 [Member] |  |
Derivative [Line Items] |  |
Senior Notes, Noncurrent | 1,250,000 |
Notes Payable from Public Offering Due 2024, 2029 and 2049 [Member] |  |
Derivative [Line Items] |  |
Senior Notes, Noncurrent | $ 2,000,000 |

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