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Long-Term Debt - Narrative (Details)
1 Months Ended 6 Months Ended
Apr. 30, 2021
USD ($)
Feb. 26, 2021
USD ($)
Oct. 21, 2020
USD ($)
Dec. 11, 2018
USD ($)
May 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument              
Increase (decrease) in accounts receivable           $ 566,900,000  
Outstanding principal           4,492,300,000 $ 4,632,300,000
Amarillo Rattler, LLC              
Debt Instrument              
Payments to acquire gathering and processing system $ 50,000,000.0            
Term Loan Due 2021              
Debt Instrument              
Line of credit facility, consolidated indebtedness to consolidated EBITDA, ratio       5.5      
Outstanding principal           250,000,000.0 350,000,000.0
AR Facility due 2023              
Debt Instrument              
Outstanding principal           210,000,000.0 $ 250,000,000.0
Letters of credit              
Debt Instrument              
Additional amount available (not to exceed)           1,750,000,000  
Line of credit facility, fair value of amount outstanding           0  
Minimum | Term Loan Due 2021              
Debt Instrument              
Conditional Acquisition Purchase Price       $ 50,000,000.0      
Maximum | Term Loan Due 2021              
Debt Instrument              
Line of credit facility, consolidated indebtedness to consolidated EBITDA, ratio       5.5      
Line of Credit | Asset-backed Securities              
Debt Instrument              
Maximum borrowing capacity   $ 300,000,000.0 $ 250,000,000.0     300,000,000.0  
Line of credit facility, increase in period   $ 50,000,000.0          
Drawn fee percentage   1.25% 1.625%        
Letter of Credit | Letters of credit | ENLC              
Debt Instrument              
Line of credit facility, fair value of amount outstanding           40,700,000  
LIBOR | Line of Credit | Minimum | Asset-backed Securities              
Debt Instrument              
Variable rate   0.00% 0.375%        
Unsecured Debt | Term Loan Due 2021              
Debt Instrument              
Repayments of borrowings         $ 100,000,000.0    
Face amount           250,000,000.0  
Unsecured Debt | Letters of credit              
Debt Instrument              
Line of credit facility, consolidated indebtedness to consolidated EBITDA, during an acquisition period, ratio 5.5            
Unsecured Debt | Minimum | Letters of credit              
Debt Instrument              
Conditional Acquisition Purchase Price           $ 50,000,000.0  
Unsecured Debt | Maximum | Letters of credit              
Debt Instrument              
Line of credit facility, consolidated indebtedness to consolidated EBITDA, during an acquisition period, ratio           5.5  
Letter of Credit | Letters of credit              
Debt Instrument              
Maximum borrowing capacity           $ 500,000,000.0  
Covenant, percentage of letter of credits guaranteed           105.00%