Revenue Recognition Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2018

Contract with Customer, Asset and Liability [Table Text Block]

The following table presents a reconciliation of our contract liabilities:



	December 31, 2018
	(Thousands)
Balance at beginning of period	$	247,296
Payments received and deferred	—
Recognized in revenue	(10,566		)
Balance at end of period	$	236,730

Contract with Customer, Liablity Expected Timing of Revenue Recognition [Table Text Block]

The following table presents the amount of the contract liabilities balance as of December 31, 2018, expected to be recognized as revenue in each of the next five years as performance obligations are expected to be satisfied:



	(Thousands)
2019	$	10,566
2020	10,568
2021	10,566
2022	10,566
2023	10,566
Thereafter	183,898

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

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 tariffs 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. It also excludes consideration that will be recognized in future periods (see above for Contract Liabilities and the expected recognition of those amounts within revenue). As noted above, certain of our contracts contain evergreen provisions for periods beyond the initial term of the contract. The remaining performance obligation 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	$	2,085,113
2020	1,956,772
2021	1,881,776
2022	1,520,358
2023	1,386,290
Thereafter	12,501,777
Total	$	21,332,086