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Supplemental Oil and Gas Disclosures - Revision of Previous Estimates, Extensions, Discoveries and Other Additions and Sales of Reserves in Place (Details)
$ in Millions
2 Months Ended 10 Months Ended 12 Months Ended
Dec. 31, 2016
MBoe
Dec. 31, 2016
Oct. 20, 2016
MBoe
Dec. 31, 2015
USD ($)
MBoe
Dec. 31, 2014
MBoe
Estimated Quantities of Proved Oil and Natural Gas Reserves          
Revision of Previous Estimates, development schedule (in years)   5 years      
Revision of Previous Estimates, development plan (in years)   5 years      
Revision of previous estimates 55,172        
Extensions, Discoveries and Other Additions, development schedule (in years)   5 years      
Extensions, Discoveries and Other Additions, development plan (in years)   5 years      
Predecessor          
Estimated Quantities of Proved Oil and Natural Gas Reserves          
Revision of previous estimates     (3,706) (75,700) (22,925)
Sales of reserves in place       5,019 16,391
Predecessor | Dequincy Divestiture          
Estimated Quantities of Proved Oil and Natural Gas Reserves          
Sales of reserves in place       2,307  
Predecessor | Gulf Coast area          
Estimated Quantities of Proved Oil and Natural Gas Reserves          
Revision of previous estimates         3,084
Predecessor | Anadarko Basin area          
Estimated Quantities of Proved Oil and Natural Gas Reserves          
Revision of previous estimates         22,138
Predecessor | Mississippian Lime area          
Estimated Quantities of Proved Oil and Natural Gas Reserves          
Revision of Previous Estimates, percentage of reductions due to transfer of proved undeveloped reserves       98.00%  
Transfer of proved undeveloped reserves (in MBoe)       77,362  
Amount of transfer of proved undeveloped reserves | $       $ 179.0  
Partially offset due to positive revisions (in MBoe)         2,297
Predecessor | Mississippian Lime area | Interest rate swap          
Estimated Quantities of Proved Oil and Natural Gas Reserves          
Sales of reserves in place       2,712