Marcellus Shale Firm Transportation Commitments (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Revenues and expenses associated with these agreements, as well as those associated with purchasing and selling third-party natural gas to mitigate Leach/Rayne Xpress capacity, are as follows:



		Year Ended December 31,
(millions)	Statements of Operations Location	2018		2017		2016
Sales of Purchased Gas	Sales of Purchased Oil and Gas and Other	$	113	$	—	$	—

Cost of Purchased of Gas	Other Operating Expense, Net	108		—		—
Utilized Firm Transportation Expense ⁽¹⁾	Other Operating Expense, Net	29		—		—
Unutilized Firm Transportation Expense	Other Operating Expense, Net	3		—		—
Cost of Purchased Gas, Total	Other Operating Expense, Net	$	140	$	—	$	—


⁽¹⁾	Includes the net impact of the difference in the firm transportation contract rates and the rates agreed to in the capacity releases. Additionally, amount includes transportation expense associated with our transport of purchased natural gas on Leach/Rayne Xpress.

In addition to the retained firm transportation commitments, we also have the following accrued discounted liabilities associated with the exit cost activities described above:



	December 31,
(millions)	2018			2017
Balance at Beginning of Period	$	90		$	—
Marcellus Exit Cost Accrual	—			93
Payments, Net of Accretion	(10		)	(3		)
Balance at End of Period	$	80		$	90
Less Current Portion Included in Other Current Liabilities	13			14
Long-term Portion Included in Other Noncurrent Liabilities	$	67		$	76