Revenues (Tables)

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table presents the Company's revenues disaggregated by type of service for the three and nine months ended September 30, 2020 and 2019 (in millions):

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2020		2019		2020		2019
Revenues from Contracts with Customers
Firm Service (1)	$	265.8	$	275.7	$	858.1	$	919.6
Interruptible Service	8.9		8.3		24.6		19.5
Other revenues	4.9		2.8		15.3		7.9
Total Revenues from Contracts with Customers	279.6		286.8		898.0		947.0
Other operating revenues (2)	8.4		8.0		24.8		21.0
Total Operating Revenues	$	288.0	$	294.8	$	922.8	$	968.0

(1) Revenues earned from contracts with minimum volume commitments (MVCs) are included in firm service given the stand-ready nature of the performance obligation and the guaranteed nature of the fees over the contract term. The nine months ended September 30, 2019, contains $26.2 million of proceeds received related to the bankruptcy of a customer as discussed in Note 5.

(2) Other operating revenues include certain revenues earned from operating leases, pipeline management fees and other activities that are not considered central and ongoing major business operations of the Company and do not represent revenues earned from contracts with customers.

Contract Liabilities

Significant changes in the contract liabilities balances during the nine months ended September 30, 2020, are as follows (in millions):

	Contract Liabilities
Balance as of December 31, 2019(1)	$	11.8
Revenues recognized that were included in the contract liability balance at the beginning of the period	(3.3)
Increases due to cash received, excluding amounts recognized as revenues during the period	9.0
Balance as of September 30, 2020(1)	$	17.5

(1) As of September 30, 2020, and December 31, 2019, $6.0 million and $2.2 million were recorded in Deferred income (current portion) and $11.5 million and $9.6 million were recorded in Other Liabilities (noncurrent portion).

Significant changes in the contract liabilities balances during the nine months ended September 30, 2019, are as follows (in millions):

	Contract Liabilities
Balance as of December 31, 2018(1)	$	9.2
Revenues recognized that were included in the contract liability balance at the beginning of the period	(1.4)
Increases due to cash received, excluding amounts recognized as revenues during the period	3.6
Balance as of September 30, 2019(1)	$	11.4

(1) As of September 30, 2019, and December 31, 2018, $1.2 million and $0.5 million were recorded in Deferred income (current portion) and $10.2 million and $8.7 million were recorded in Other Liabilities (noncurrent portion).

Remaining Performance Obligation

The following table includes estimated operating revenues expected to be recognized in the future related to agreements that contain performance obligations that were unsatisfied as of September 30, 2020. The amounts presented primarily consist of fixed fees or MVCs which are typically recognized over time as the performance obligation is satisfied, as in accordance with firm service contracts. Additionally, for the Company’s customers that are charged maximum tariff rates related to its Federal Energy Regulatory Commission (FERC) regulated operating subsidiaries, the amounts below reflect the current tariff rate for such services for the term of the agreements; however, the tariff rates may be subject to future adjustment. The Company has elected to exclude the following from the table: (a) unsatisfied performance obligations from usage fees associated with its firm services because of the stand-ready nature of such services; (b) consideration in contracts that are recognized in revenue as invoiced, such as for interruptible services; and (c) consideration that was received prior to September 30, 2020, that will be recognized in future periods, such as recorded in contract liabilities. The estimated revenues reflected in the table may include estimated revenues that are anticipated under executed precedent transportation agreements for projects that are subject to regulatory approvals.

	In millions
	2020 (1)		2021		Thereafter		Total
Estimated revenues from contracts with customers     from unsatisfied performance obligations as of     September 30, 2020	$	295.5	$	1,077.0	$	7,534.5	$	8,907.0
Operating revenues which are fixed and determinable (operating leases)	5.5		23.0		220.0		248.5
Total projected operating revenues under committed     firm agreements as of September 30, 2020	$	301.0	$	1,100.0	$	7,754.5	$	9,155.5

(1) The 2020 period is for the three months ending December 31, 2020. For the nine months ended September 30, 2020, the Company recognized $816.9 million of fixed fee revenues for the fulfillment of performance obligations.