Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Details)

v3.20.1
Financial Instruments (Details)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
Bcf
Not Designated as Hedging Instrument | Current asset  
Derivatives, Fair Value [Line Items]  
Derivative asset, gross $ 3.5
Not Designated as Hedging Instrument | Other non-current asset  
Derivatives, Fair Value [Line Items]  
Derivative asset, gross 0.2
Not Designated as Hedging Instrument | Current liabilities  
Derivatives, Fair Value [Line Items]  
Derivative liability, gross 0.0
Not Designated as Hedging Instrument | Other non-current liability  
Derivatives, Fair Value [Line Items]  
Derivative liability, gross $ 0.0
Commodity swaps  
Derivatives, Fair Value [Line Items]  
Hedged portions of expected sales of equity production | Bcf 8.8
Commodity swaps | Not Designated as Hedging Instrument  
Derivatives, Fair Value [Line Items]  
Realized gain on derivatives $ 2.3
Unrealized gain on derivatives 0.1
Level 2 | Commodity swaps | Not Designated as Hedging Instrument | Current asset  
Derivatives, Fair Value [Line Items]  
Derivative assets (liabilities), net 3.5
Level 2 | Commodity swaps | Not Designated as Hedging Instrument | Other non-current asset  
Derivatives, Fair Value [Line Items]  
Derivative assets (liabilities), net $ 0.2