Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities (Subsequent Events) (Details)

v3.8.0.1
Derivative Instruments and Hedging Activities (Subsequent Events) (Details) - Forecast - Not Designated as Hedging Instrument - Oil - Collar contracts combined with short puts (WTI, three-way collars), Subsequent Contracts
9 Months Ended 12 Months Ended
Dec. 31, 2018
$ / MMBTU
MBbls
Dec. 31, 2019
$ / MMBTU
MBbls
Derivative [Line Items]    
Total volume (MBbls) | MBbls 0 730,000
Call option | Short    
Derivative [Line Items]    
Strike price (in dollars per share) 0 66.53
Put option | Short    
Derivative [Line Items]    
Strike price (in dollars per share) 0 45
Put option | Long    
Derivative [Line Items]    
Strike price (in dollars per share) 0 55