Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 5.4	$ 11.5
Variable lease cost	1.1	6.6
Short-term lease payments	$ 26.3	$ 267.9
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	6 months
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	25 years
Drilling Rigs, Fracturing and Other Equipment | Minimum
Lessee, Lease, Description [Line Items]
Short-term lease, term	30 days
Drilling Rigs, Fracturing and Other Equipment | Maximum
Lessee, Lease, Description [Line Items]
Short-term lease, term	1 year