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RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES, Part 2 (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) MMcf MMBbls	Dec. 31, 2019 USD ($) MMcf MMBbls
Derivative [Line Items]
Notional Amount Of Cash Flow Hedge Instruments Settled	$ 750.0
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	(47,600)	(59,000.0)
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	(47,600)	(59,000.0)
Designated as Hedging Instrument [Member] | Futures, forwards and swaps | - Crude oil and NGLs (MMBbl) | Fixed price | Purchased/ Payor
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | MMBbls	10.5	7.9
Designated as Hedging Instrument [Member] | Futures, forwards and swaps | - Crude oil and NGLs (MMBbl) | Fixed price | Sold/ Receiver
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | MMBbls	(17.5)	(17.4)
Designated as Hedging Instrument [Member] | Interest Rate Contract | Purchased/ Payor
Derivative [Line Items]
Derivative, Notional Amount	$ 2,400.0	$ 3,100.0
Designated as Hedging Instrument [Member] | Interest Rate Contract | Sold/ Receiver
Derivative [Line Items]
Derivative, Notional Amount	0.0	0.0
LIBOR Based Interest Payments [Member] | Cash Flow Hedging [Member] | Forward Contracts | Interest Rate Contract
Derivative [Line Items]
Derivative, Notional Amount	1,300.0	1,300.0
Forecasted Debt Issuances [Member] | Cash Flow Hedging [Member] | Forward Contracts | Interest Rate Contract
Derivative [Line Items]
Derivative, Notional Amount	1,100.0	$ 1,800.0
Notes Payable from Public Offering Due 2025, 2030 and 2050 [Member]
Derivative [Line Items]
Senior notes, noncurrent	$ 1,750.0

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
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