Contingencies and Commitments - Narrative (Details) - USD ($)			1 Months Ended	8 Months Ended
	Aug. 28, 2019	Jan. 05, 2014	Feb. 28, 2019	Aug. 09, 2018
Commonwealth of Pennsylvania, royalty underpayment | Settled litigation
Loss Contingencies [Line Items]
Settlement amount				$ 35,000,000
Pennsylvania Department of Environmental Protection | Settled litigation | Chesapeake Appalachia, L.L.C.
Loss Contingencies [Line Items]
Settlement amount	$ 100,000
Chaparral Energy, Inc. | Healthcare of Ontario Pension Plan (HOOPP) | Pending litigation
Loss Contingencies [Line Items]
Loss contingency, damages sought, value		$ 215,000,000
FTS International, Inc. | Putative class action lawsuit | Pending litigation
Loss Contingencies [Line Items]
Loss contingency, damages sought, value			$ 1,000,000