Consolidated Balance Sheet - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash	$ 0	$ 0
Receivables:
Trade	234,680	223,864
Affiliates	6,978	1,011
Advances to affiliate	1,669,368	642,734
Other (less allowance of $6,222 and $— in 2021 and 2020, respectively)	12,977	14,660
Transportation and exchange gas receivables	7,685	4,627
Inventories:
Gas in storage, at original cost	695	926
Gas available for customer nomination, at average cost	12,553	7,909
Materials and supplies, at average cost	41,189	47,462
Regulatory assets	114,351	62,861
Other	17,058	13,847
Total current assets	2,117,534	1,019,901
Property, Plant and Equipment:
Natural gas transmission plant	17,713,050	17,123,779
Less-Accumulated depreciation and amortization	5,227,128	4,802,256
Total property, plant and equipment, net	12,485,922	12,321,523
Other Assets:
Regulatory assets	253,081	281,870
Right-of-use assets	68,817	78,899
Other	292,957	252,051
Total other assets	614,855	612,820
Total assets	15,218,311	13,954,244
Payables:
Trade	163,001	109,636
Affiliates	69,128	32,676
Cash overdrafts	21,404	18,813
Transportation and exchange gas payables	10,125	1,905
Accrued liabilities:
Property and other taxes	26,470	20,177
Interest	76,656	75,806
Regulatory liabilities	57,369	57,086
Customer deposits	21,004	24,686
Customer advances	14,582	27,082
Asset retirement obligations	58,418	52,764
Other	25,883	41,864
Long-term debt due within one year	25,594	22,640
Total current liabilities	569,634	485,135
Long-Term Debt	5,269,024	5,217,140
Other Long-Term Liabilities:
Asset retirement obligations	459,969	397,737
Regulatory liabilities	932,101	946,774
Deferred revenue	194,464	205,030
Lease liability	68,582	78,688
Advances for construction costs	0	38,585
Other	4,281	4,336
Total other long-term liabilities	1,659,397	1,671,150
Contingent Liabilities and Commitments (Note 4)
Member's Equity:
Member's capital	4,960,499	4,543,499
Retained earnings	2,759,757	2,037,320
Total member's equity	7,720,256	6,580,819
Total liabilities and member's equity	$ 15,218,311	$ 13,954,244