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ESTIMATES, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND BALANCE SHEET DETAIL Estimates, Significant Accounting Policies and Balance Sheet Detail (Tables)
 12 Months Ended
Dec. 31, 2021
Summary of Significant Accounting Policies [Abstract]  
Other Current Liabilities [Table Text Block]
Other Current Liabilities. Other current liabilities consisted of the following:
 December 31,
 20212020
Deposits from customers$14 $8 
Accrued expenses34 13 
Accrued capital expenditures8 4 
Other6 8 
Total other current liabilities
$62 $33 
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Non-cash investing and financing activities and supplemental cash flow information are as follows:
Years Ended December 31,
202120202019
Non-cash investing and financing activities:
Settlement of affiliate liability - related company payables$— $(4)$— 
Supplemental cash flow information:
Accrued capital expenditures
$8 $4 $11 
Cash paid for interest, net of interest capitalized
15 16 23 
Cash paid for interest on note payable to related company18 33 23 
Property, Plant and Equipment [Table Text Block]
December 31,
Lives in Years20212020
Land and improvements
$4 $4 
Buildings and improvements
6 – 46195 197 
Pipelines and equipment
5 – 462,684 2,631 
Natural gas storage facilities
26 – 46368 360 
Other
3 – 21145 142 
Construction work in progress
25 15 
Property, plant and equipment
3,421 3,349 
Accumulated depreciation and amortization
(813)(717)
Property, plant and equipment, net
$2,608 $2,632 
Schedule of Inventory, Current [Table Text Block]
The following table presents the components of inventory:
 December 31,
 20212020
Natural gas (1)
$36 $63 
Materials and supplies
21 23 
 $57 $86 
(1)Natural gas volumes held for operations at December 31, 2021 and 2020 were 11.4 TBtu and 29.2 TBtu, respectively.
Other Noncurrent Liabilities [Table Text Block]
Other Non-Current Liabilities. Other non-current liabilities consisted of the following:
 December 31,
 20212020
Pension liability$110 $97 
ARO56 37 
Provision for rate refunds (1)
57 24 
Other89 88 
Total other non-current liabilities
$312 $246 
(1) Provision for rate refunds represents future amounts to be settled with the Company’s shippers under FERC regulation.
Schedules of Concentration of Risk, by Risk Factor
The following table presents the relative contribution to the Company’s total operating revenue from operations of each customer that comprised at least 10% of its operating revenues:
Years Ended December 31,
 202120202019
Customer A
12 %12 %10 %
Customer B
17 17 16 
Other top 10 customers
29 31 31 
Remaining customers
42 40 43 
Total percentage100 %100 %100 %