Exit Costs - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
North Louisiana
Restructuring Cost And Reserve [Line Items]
Accretion expense	$ 21.0	$ 22.1
Exit and termination costs	37.8	$ 24.8
Exit cost	400.0
Pennsylvania | Capacity Releases on Transportation Pipelines
Restructuring Cost And Reserve [Line Items]
Exit cost	$ 3.8