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Debt - Energy Services (Details) - Term Loan - Line of Credit - USD ($)
Aug. 13, 2019
Aug. 31, 2019
Debt Instrument    
Debt instrument, term 7 years  
Energy Services    
Debt Instrument    
Aggregate principal amount $ 700,000,000  
Debt instrument, quarterly payment $ 1,800,000  
Basis spread on variable rate (percentage) 3.75%  
Energy Services | London Interbank Offered Rate (LIBOR)    
Debt Instrument    
Derivative, fixed interest rate   1.55%