Condensed Consolidated Balance Sheet (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets:
Cash	$ 109	$ 113
Receivables:
Affiliates	2,879	2,601
Advances to affiliate	412,225	526,380
Trade and other	119,799	148,172
Transportation and exchange gas receivables	2,904	6,757
Inventories	72,718	47,532
Regulatory assets	61,310	37,520
Other	20,217	13,451
Total current assets	692,161	782,526
Investments, at cost plus equity in undistributed earnings	48,032	50,262
Property, Plant and Equipment:
Natural gas transmission plant	9,334,231	8,867,626
Less-Accumulated depreciation and amortization	3,231,725	3,090,234
Total property, plant and equipment, net	6,102,506	5,777,392
Other Assets:
Regulatory assets	247,452	256,612
Other	67,405	57,785
Total other assets	314,857	314,397
Total Assets	7,157,556	6,924,577
Payables:
Affiliates	27,721	28,268
Trade and other	199,488	114,635
Transportation and exchange gas payables	14,192	3,599
Reserve for rate refunds	0	98,217
Accrued liabilities	126,987	153,263
Total current liabilities	368,388	397,982
Long-Term Debt	1,428,459	1,428,355
Other Long-Term Liabilities:
Asset retirement obligations	275,935	238,085
Regulatory liabilities	313,717	269,563
Other	19,605	5,307
Total other long-term liabilities	609,257	512,955
Contingent Liabilities and Commitments (Note 2)
Owner's Equity:
Member's capital	2,421,499	2,257,499
Retained earnings	2,330,055	2,328,044
Accumulated other comprehensive loss	(102)	(258)
Total owner's equity	4,751,452	4,585,285
Total liabilities and owner's equity	$ 7,157,556	$ 6,924,577