ESTIMATES, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND BALANCE SHEET DETAIL Estimates, Significant Accounting Policies and Balance Sheet Detail (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Significant Accounting Policies [Abstract]

Schedule of Goodwill [Table Text Block]

Changes in the carrying amount of goodwill were as follows:

	Total
Balance, December 31, 2016	$	285
Impairment losses	(262		)
Balance, December 31, 2017	23
Goodwill associated with assets distributed to parent	(11		)
Balance, December 31, 2018	$	12

Other Current Liabilities [Table Text Block]

Other Current Liabilities. Other current liabilities consisted of the following:

	December 31,
	2018		2017
Deposits from customers	$	25	$	10
Accrued expenses	24		22
Other	20		21
Total other current liabilities	$	69	$	53

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Non-cash investing and financing activities and supplemental cash flow information are as follows:

	Years Ended December 31,
	2018			2017			2016
Non-cash investing activities:
Settlement of affiliate receivable - note receivable	$	—		$	—		$	541
Settlement of affiliate receivable - tax receivable	—			—			240
Settlement of affiliate liability - tax payable	(19		)	(8		)	—
Settlement of affiliate liability - related party payables	(12		)	—			—
Contribution of assets from affiliate	(7		)	—			—
Distribution of non-cash assets to parent	68			—			—
Supplemental cash flow information:
Accrued capital expenditures	$	13		$	11		$	15
Cash paid for interest, net of interest capitalized	43			75			75
Cash received for interest on note receivable from affiliate	—			18			40
Cash paid for interest on note payable to affiliate	13			—			—

Property, Plant and Equipment [Table Text Block]

		December 31,
	Lives in Years	2018			2017
Land and improvements		$	3		$	3
Buildings and improvements	6 – 46	158			162
Pipelines and equipment	5 – 46	2,556			2,571
Natural gas storage facilities	26 – 46	282			279
Other	3 – 21	160			157
Construction work in progress		37			27
Property, plant and equipment		3,196			3,199
Accumulated depreciation and amortization		(507		)	(419		)
Property, plant and equipment, net		$	2,689		$	2,780

Schedule of Inventory, Current [Table Text Block]

The following table presents the components of inventory:

	December 31,
	2018		2017
Natural gas (1)	$	79	$	132
Materials and supplies	19		18
	$	98	$	150

⁽¹⁾  Natural gas volumes held for operations at December 31, 2018 and 2017 were 25.9 TBtu and 37.9 TBtu, respectively.

Revenue from External Customers by Products and Services [Table Text Block]

The following table presents the relative contribution to the Company’s total operating revenue from continuing operations of each customer that comprised at least 10% of its operating revenues:

	Years Ended December 31,
	2018		2017		2016
Customer A	10	%	13	%	12	%
Customer B	16		—		—
Other top 10 customers	28		41		38
Remaining customers	46		46		50
Total percentage	100	%	100	%	100	%

Other Noncurrent Liabilities [Table Text Block]

	December 31,
	2018		2017
Pension liability	$	117	$	120
ARO Liability	26		57
Other	90		64
Total other non-current liabilities	$	233	$	241