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Summary of Significant Accounting Policies - Consolidation and Midstream Simplification (Details) - USD ($) $ in Millions	Mar. 30, 2021	Sep. 30, 2021
Simplification Transaction | OMP
Related Party Transaction [Line Items]
Consideration contributed	$ 512.5
Cumulative cash distributions	$ 231.5
Ownership interest (in shares)	12,949,644
Units converted (in shares)	1,850,356
Bobcat DevCo | Oasis Midstream Partners, LP
Related Party Transaction [Line Items]
Percentage acquired	64.70%
Beartooth DevCo | Oasis Midstream Partners, LP
Related Party Transaction [Line Items]
Percentage acquired	30.00%
Oasis Midstream Partners, LP
Related Party Transaction [Line Items]
Parent ownership interest		70.00%

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