Revenue Recognition Revenue Recognition (Notes)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Text Block]

REVENUE RECOGNITION

Revenue by Category

Our revenue disaggregation by major service line includes Natural gas transportation, Natural gas storage, and Other, which are separately presented on the Statement of Comprehensive Income (Loss).

We do not have any contract assets or material contract liabilities.

Remaining Performance Obligations

The following table presents the transaction price allocated to the remaining performance obligations under certain contracts as of December 31, 2018. These primarily include reservation charges on contracted capacity on our firm transportation and storage contracts with customers. Amounts from certain contracts included in the table below, which are subject to the periodic review and approval by the FERC, reflect the rates for such services in our current FERC tariffs for the life of the related contracts; however, these rates may change based on future rate cases or settlements approved by the FERC and the amount and timing of these changes is not currently known. As a practical expedient permitted by ASC 606, this table excludes the variable consideration component for commodity charges that will be recognized in future periods. As noted above, certain of our contracts contain evergreen provisions for periods beyond the initial term of the contract. The remaining performance obligations as of December 31, 2018, does not consider potential future performance obligations for which the renewal has not been exercised. The table below also does not include contracts with customers for which the underlying facilities have not received FERC authorization to be placed into service.



	(Thousands)
2019	$	427,705
2020	404,899
2021	378,288
2022	372,446
2023	329,338
Thereafter	1,832,771
Total	$	3,745,447

The table above excludes remaining performance obligations associated with certain contract extensions executed in February 2019. The additional performance obligations associated with these contract extensions are approximately $11 million in 2023 and $549 million thereafter.

Receivables from contracts with customers are included within Receivables - Trade and Receivables - Affiliated companies and receivables that are not related to contracts with customers comprise the balance of Receivables - Advances to affiliate and Receivables - Other in our Balance Sheet.