Property, Plant and Equipment - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Impairment	$ 101.8
Market-based weighted average cost of capital | Discounted cash flow
Property, Plant and Equipment [Line Items]
Weighted average cost of capital (percent)	10.40%
Crude oil asset group | Williston Basin
Property, Plant and Equipment [Line Items]
Impairment	$ 35.8
Crude oil asset group | Delaware Basin
Property, Plant and Equipment [Line Items]
Impairment	17.9
Freshwater asset group | Williston Basin
Property, Plant and Equipment [Line Items]
Impairment	33.1
Produced water asset group | Delaware Basin
Property, Plant and Equipment [Line Items]
Impairment	$ 15.0