Gas and Liquids Stored Underground and Gas and NGLs Receivables and Payables (Details) MMBbls in Millions, MMBTU in Millions, $ in Millions	Sep. 30, 2023 USD ($) $ / MMBTU MMBTU MMBbls	Dec. 31, 2022 USD ($) $ / MMBTU MMBTU MMBbls
Gas Balancing Arrangements [Abstract]
Gas Balancing Measurement (in MMBtu) | MMBTU	6.4	13.3
Average Market Price of Gas Assumed | $ / MMBTU	2.47	5.33
Gas Imbalance to Subsidiaries Asset Liability | $	$ 15.8	$ 70.9
Natural Gas Liquids Balancing Volume (in MMbbls) | MMBbls	0.0	0.0