Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessor, Lease, Description [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	5 years 4 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	8.00%
Operating Leases, Rent Expense	$ 25.3	$ 30.3	$ 24.9
Property, Plant and Equipment [Member]
Lessor, Lease, Description [Line Items]
Lease, Cost	13.8
Lease Operating Expense [Member]
Lessor, Lease, Description [Line Items]
Lease, Cost	11.9
Gathering and other expense [Member]
Lessor, Lease, Description [Line Items]
Lease, Cost	7.7
General and administrative expense [Member]
Lessor, Lease, Description [Line Items]
Lease, Cost	$ 5.7