Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]

Annual payments and the corresponding years for gathering, processing, transportation, drilling and fractionation contracts are as follows:

Year	Amount
	(in millions)
2020	$	25.2
2021	$	23.8
2022	$	19.4
2023	$	9.5
2024	$	5.6
After 2024	$	7.2

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

As of December 31, 2019, the maturity analysis for long-term operating leases under the scope of ASC 842 are as follows:

Year	Amount
	(in millions)
2020	$	22.3
2021	$	20.4
2022	$	15.9
2023	$	10.6
2024	$	1.4
After 2024	$	2.4
Less: Interest(1)	$	(10.2	)
Present Value of Lease Liabilities(2)	$	62.8

Lessee, Operating Lease, Disclosure [Table Text Block]

As of December 31, 2018, minimum future contractual payments for long-term operating leases under the scope of ASC 840 are as follows:

Year	Amount
	(in millions)
2019	$	17.4
2020	$	13.8
2021	$	9.1
2022	$	7.4
2023	$	4.5
After 2023	$	—