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Derivatives - Derivative Instruments (Details)
shares in Millions, $ in Millions
1 Months Ended
Apr. 30, 2020
USD ($)
Mar. 31, 2020
MMBbls
$ / Barrel
shares
Crude Oil | 2020 Settlement    
Derivative [Line Items]    
Derivative instruments (mmbls/day) | MMBbls   96.25
Crude Oil | 2020 Settlement | Short position    
Derivative [Line Items]    
Ceiling sold price (dollars per barrel)   74.16
Purchase price (dollars per barrel)   45.00
Crude Oil | 2020 Settlement | Long position    
Derivative [Line Items]    
Purchase price (dollars per barrel)   55.00
Crude Oil | 2021 Settlement    
Derivative [Line Items]    
Derivative instruments (mmbls/day) | MMBbls   127,800
Crude Oil | 2021 Settlement | Short position    
Derivative [Line Items]    
Ceiling sold price (dollars per barrel)   74.16
Subsequent Event    
Derivative [Line Items]    
Cash received | $ $ 108  
Not designated as hedging instruments | Common Stock | Warrants    
Derivative [Line Items]    
The Warrant | shares   80