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Long-Term Debt - Narrative (Details)
12 Months Ended
Dec. 14, 2020
USD ($)
Oct. 21, 2020
USD ($)
Apr. 09, 2019
USD ($)
Dec. 11, 2018
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument              
Increase in accounts receivable due to consolidation         $ 279,700,000    
Proceeds from issuance of long-term debt $ 494,700,000   $ 496,500,000   $ 1,650,000,000.0 $ 3,310,000,000.0 $ 3,946,800,000
Repurchase price as a percent of principal         101.00%    
Maximum              
Debt Instrument              
Stated interest rate         5.60%    
Maximum | EnLink Midstream Partners, LP              
Debt Instrument              
Stated interest rate         5.625%    
Minimum              
Debt Instrument              
Stated interest rate         4.15%    
Minimum | EnLink Midstream Partners, LP              
Debt Instrument              
Stated interest rate         4.15%    
Line of Credit | Asset-backed Securities              
Debt Instrument              
Maximum borrowing capacity   $ 250,000,000.0          
Drawn fee percentage   1.625%          
LIBOR | Line of Credit | Minimum | Asset-backed Securities              
Debt Instrument              
Variable rate   0.375%          
Revolviing Credit Facility Unsecured              
Debt Instrument              
Additional amount available (not to exceed)       $ 1,750,000,000 $ 2,250,000,000    
Revolviing Credit Facility Unsecured | Letter of Credit | ENLC              
Debt Instrument              
Fair value of amount outstanding         $ 22,200,000    
ENLK Credit Facility | LIBOR | Maximum | EnLink Midstream Partners, LP              
Debt Instrument              
Variable rate         2.00%    
ENLK Credit Facility | LIBOR | Minimum | EnLink Midstream Partners, LP              
Debt Instrument              
Variable rate         1.125%    
2.70% Senior unsecured notes due 2019              
Debt Instrument              
Debt instrument, face amount     400,000,000.0        
5.625% Senior unsecured notes due 2028              
Debt Instrument              
Stated interest rate         5.625%    
Letter of Credit | Revolviing Credit Facility Unsecured              
Debt Instrument              
Maximum borrowing capacity       $ 500,000,000.0      
Percentage of letter of credits guaranteed         105.00%    
Unsecured Debt              
Debt Instrument              
Percentage price of debt issued 100.00%            
Unsecured Debt | Revolviing Credit Facility Unsecured              
Debt Instrument              
Consolidated EBITDA to consolidated interest charges, ratio       2.5      
Consolidated indebtedness to consolidated EBITDA, ratio       5.0      
Consolidated indebtedness to consolidated EBITDA, during an acquisition period, ratio       5.5      
Unsecured Debt | Revolviing Credit Facility Unsecured | Minimum              
Debt Instrument              
Conditional acquisition purchase price (or more)       $ 50,000,000.0      
Unsecured Debt | Revolviing Credit Facility Unsecured | Federal Funds              
Debt Instrument              
Variable rate       0.50%      
Unsecured Debt | Revolviing Credit Facility Unsecured | Eurodollar              
Debt Instrument              
Variable rate       1.00%      
Unsecured Debt | Revolviing Credit Facility Unsecured | Eurodollar | Minimum              
Debt Instrument              
Variable rate       0.125%      
Unsecured Debt | ENLK Credit Facility | Eurodollar              
Debt Instrument              
Variable rate         1.00%    
Unsecured Debt | Term Loan due 2021              
Debt Instrument              
Consolidated EBITDA to consolidated interest charges, ratio       2.5      
Consolidated indebtedness to consolidated EBITDA, ratio       5.0      
Consolidated indebtedness to consolidated EBITDA, during an acquisition period, ratio       5.5      
Debt instrument, face amount         $ 350,000,000.0    
Unsecured Debt | Term Loan due 2021 | Minimum              
Debt Instrument              
Conditional acquisition purchase price (or more)       $ 50,000,000.0      
Unsecured Debt | Term Loan due 2021 | LIBOR | Maximum              
Debt Instrument              
Variable rate       1.75%      
Unsecured Debt | Term Loan due 2021 | LIBOR | Minimum              
Debt Instrument              
Variable rate       1.00%      
Unsecured Debt | Term Loan due 2021 | Federal Funds              
Debt Instrument              
Variable rate       0.50%      
Unsecured Debt | Term Loan due 2021 | Eurodollar              
Debt Instrument              
Variable rate       1.00%      
Unsecured Debt | Term Loan due 2021 | Eurodollar | Maximum              
Debt Instrument              
Variable rate       0.75%      
Unsecured Debt | Term Loan due 2021 | Eurodollar | Minimum              
Debt Instrument              
Variable rate       0.00%      
Unsecured Debt | Term Loan Due 2029              
Debt Instrument              
Debt instrument, face amount     $ 500,000,000.0        
Stated interest rate     5.375%        
Percentage price of debt issued     100.00%        
Unsecured Debt | 5.625% Senior unsecured notes due 2028              
Debt Instrument              
Debt instrument, face amount $ 500,000,000.0            
Stated interest rate 5.625%            
Percentage price of debt issued 100.00%