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RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES - Part 1 (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2020
Dec. 31, 2021
Derivatives, Fair Value [Line Items]        
Assets $ 178,153 $ 178,153   $ 204,161
(Liabilities) (124,566) (124,566)   (449,264)
Cash posted - offsetting derivative net liability positions under master-netting arrangements       99,600
Realized Gain on Settled Interest Rate Swaps Recorded in AOCI 28,100      
Notional Amount Of Cash Flow Hedge Instruments Settled   750,000 $ 1,300,000  
Notional Amount of Cash Flow Hedge Instruments Terminated 375,000      
Notes Payable from Public Offering Due 2032        
Derivatives, Fair Value [Line Items]        
Senior Notes, Noncurrent 750,000 750,000    
Derivatives designated as hedging instruments        
Derivatives, Fair Value [Line Items]        
Assets 177,595 177,595   204,161
(Liabilities) (124,326) (124,326)   (449,264)
Derivatives not designated as hedging instruments        
Derivatives, Fair Value [Line Items]        
Assets 558 558   0
(Liabilities) (240) (240)   0
Interest Rate Contracts | Derivatives designated as hedging instruments | Purchased/Payor        
Derivatives, Fair Value [Line Items]        
Derivative, Notional Amount 400,000 400,000   1,100,000
Natural Gas Pipelines        
Derivatives, Fair Value [Line Items]        
Derivative, Fair Value, Net 0 0   0
Other Current Assets [Member] | Commodity Contract | Financial contracts | Derivatives designated as hedging instruments        
Derivatives, Fair Value [Line Items]        
Assets 160,390 160,390    
(Liabilities) (123,121) (123,121)    
Other Current Assets [Member] | Commodity Contract | Financial contracts | Derivatives not designated as hedging instruments        
Derivatives, Fair Value [Line Items]        
Assets 558 558   0
(Liabilities) (240) (240)   0
Other Current Assets [Member] | Interest Rate Contracts | Derivatives designated as hedging instruments        
Derivatives, Fair Value [Line Items]        
Assets 10,918 10,918   0
Other Current Liabilities [Member] | Interest Rate Contracts | Derivatives designated as hedging instruments        
Derivatives, Fair Value [Line Items]        
(Liabilities) 0 0   (145,524)
Fully Netted Assets/Liabilities | Commodity Contract | Financial contracts | Derivatives designated as hedging instruments        
Derivatives, Fair Value [Line Items]        
Assets       204,161
(Liabilities)       (303,740)
Other Assets [Member] | Commodity Contract | Financial contracts | Derivatives designated as hedging instruments        
Derivatives, Fair Value [Line Items]        
Assets 6,287 6,287   0
(Liabilities) (1,205) (1,205)   0
Interest Rate Contracts | Cash Flow Hedging [Member] | Forward contracts | Forecasted Debt Issuances [Member]        
Derivatives, Fair Value [Line Items]        
Derivative, Notional Amount $ 400,000 $ 400,000   $ 1,100,000