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Gas and Liquids Stored Underground and Gas and NGLs Receivables and Payables
 9 Months Ended
Sep. 30, 2022
Gas Balancing Arrangements [Abstract]  
Gas and Liquids Stored Underground and Gas and NGLs Receivables and Payables Gas and Liquids Stored Underground and Gas and NGLs Receivables and Payables
The operating subsidiaries of the Company provide storage services whereby they store natural gas or NGLs on behalf of customers and also periodically hold customer gas under parking and lending (PAL) services. Since the customers retain title to the gas held by the Company in providing these services, the Company does not record the related gas on its Condensed Consolidated Balance Sheets.

The operating subsidiaries of the Company also periodically lend gas to customers under PAL and certain firm services, and gas or NGLs may be owed to the operating subsidiaries as a result of transportation imbalances. As of September 30, 2022, the amount of gas owed to the Company's operating subsidiaries due to gas imbalances and gas loaned under PAL and certain firm service agreements was approximately 11.3 trillion British thermal units (TBtu). Assuming an average market price during September 2022 of $7.26 per million British thermal unit (MMBtu), the market value of that gas was approximately $82.0 million. As of December 31, 2021, the amount of gas owed to the Company's operating subsidiaries due to gas imbalances and gas loaned under PAL and certain firm service agreements was approximately 7.4 TBtu. Assuming an average market price during December 2021 of $3.59 per MMBtu, the market value of that gas was approximately $26.6 million. As of September 30, 2022, and December 31, 2021, there were no outstanding NGL imbalances owed to the Company's operating subsidiaries. If any significant customer should have credit or financial problems resulting in a delay or failure to pay for services provided or repay the gas owed to the operating subsidiaries, it could have a material adverse effect on the Company's financial condition, results of operations or cash flows.