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RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES - Part 2 (Details) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($) Bcf MMBbls	Dec. 31, 2020 USD ($) MMBbls Bcf
Derivative [Line Items]
Realized Loss on Settled Interest Rate Swaps Recorded in AOCI	$ 48.3	$ 152.5		$ 48.3
Notional Amount Of Cash Flow Hedge Instruments Settled	$ 1,300.0	750.0		1,300.0
Derivatives designated as hedging instruments | Interest Rate Contract | Purchased/Payor
Derivative [Line Items]
Derivative, Notional Amount			$ 1,100.0	$ 1,100.0
Derivatives designated as hedging instruments | Future | Natural gas (Bcf) | Fixed price | Sold/Receiver
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | Bcf			32.3	43.3
Derivatives designated as hedging instruments | Future | Natural gas (Bcf) | Basis | Sold/Receiver
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | Bcf			30.5	43.3
Derivatives designated as hedging instruments | Future | Crude oils and NGLs (MMBbl) | Fixed price | Sold/Receiver
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MMBbls			10.0	4.6
Derivatives not designated as hedging instruments | Future | Crude oils and NGLs (MMBbl) | Fixed price | Purchased/Payor
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MMBbls			0.8
Derivatives not designated as hedging instruments | Future | Crude oils and NGLs (MMBbl) | Fixed price | Sold/Receiver
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MMBbls			0.8
Forecasted Debt Issuances [Member] | Cash Flow Hedging [Member] | Forward contracts | Interest Rate Contract
Derivative [Line Items]
Derivative, Notional Amount			$ 1,100.0	$ 1,100.0
Notes Payable from Public Offering Due 2025, 2030 and 2050 [Member]
Derivative [Line Items]
Senior Notes, Noncurrent		$ 1,750.0

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