Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Details)

v3.20.2
Financial Instruments (Details) - Commodity swaps
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
Bcf
Derivatives, Fair Value [Line Items]    
Hedged portions of expected sales of equity production | Bcf   4.8
Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Realized gain on derivatives $ 1.0 $ 4.8
Unrealized loss on derivatives 2.9 4.6
Level 2 | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative assets (liabilities), net $ (1.1) $ (1.1)