Condensed Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current Assets:
Cash	$ 0	$ 0
Receivables:
Affiliates	1,685	669
Trade and other	233,039	253,266
Transportation and exchange gas receivables	5,663	6,360
Inventories	63,862	64,992
Regulatory assets	62,559	69,440
Other	10,753	11,240
Total current assets	377,561	405,967
Property, Plant and Equipment
Natural gas transmission plant	16,888,643	16,764,904
Less-Accumulated depreciation and amortization	4,528,011	4,438,077
Total property, plant and equipment, net	12,360,632	12,326,827
Other Assets:
Regulatory assets	318,200	290,923
Right-of-use assets	83,342	84,979
Other	196,426	210,017
Total other assets	597,968	585,919
Total Assets	13,336,161	13,318,713
Payables:
Affiliate	40,767	47,740
Advances from affiliate	316,907	252,549
Trade and other	118,607	183,968
Transportation and exchange gas payables	607	3,961
Reserve for rate refunds	248,291	188,842
Regulatory liabilities	57,092	57,359
Accrued liabilities	158,908	199,128
Long-term debt due within one year	20,644	20,180
Total current liabilities	961,823	953,727
Long-Term Debt	4,041,622	4,044,790
Other Long-Term Liabilities:
Asset retirement obligations	431,937	426,505
Regulatory liabilities	962,945	966,961
Deferred revenue	212,957	215,598
Lease liability	83,107	84,528
Other	28,003	20,821
Total other long-term liabilities	1,718,949	1,714,413
Contingent Liabilities and Commitments (Note 3)
Members' Equity
Member's capital	4,428,499	4,428,499
Retained earnings	2,185,268	2,177,284
Total member's equity	6,613,767	6,605,783
Total liabilities and member's equity	$ 13,336,161	$ 13,318,713