Other Long-term Liabilities - Deferred Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Revenue and Other [Abstract]
Deferred revenue	$ 171.8	$ 168.5	$ 172.0
Deferred revenue recognized related to gas gathering and processing agreement	$ 3.9	$ 3.8	3.9
Channelview Splitter [Member]
Deferred Revenue and Other [Abstract]
Deferred revenue			$ 129.0