Segment Information - Assets (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Segment Reporting
Total identifiable assets	$ 8,640.2	$ 8,483.2
Permian
Segment Reporting
Total identifiable assets	2,500.2	2,358.6
Louisiana
Segment Reporting
Total identifiable assets	2,442.9	2,428.6
Oklahoma
Segment Reporting
Total identifiable assets	2,582.9	2,619.5
North Texas
Segment Reporting
Total identifiable assets	866.8	896.8
Corporate
Segment Reporting
Total identifiable assets	$ 247.4	$ 179.7