Basis of Presentation and Significant Accounting Policies	3 Months Ended
Mar. 31, 2012
Basis of Presentation and Significant Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	1. Basis of Presentation and Significant Accounting Policies Basis of Presentation We prepared this Quarterly Report on Form 10-Q under the rules and regulations of the United States Securities and Exchange Commission. As an interim period filing presented using a condensed format, it does not include all of the disclosures required by U.S. generally accepted accounting principles, and should be read along with our 2011 Annual Report on Form 10-K. The financial statements as of March 31, 2012, and for the quarters ended March 31, 2012 and 2011, are unaudited. The condensed consolidated balance sheet as of December 31, 2011, was derived from the audited balance sheet filed in our 2011 Annual Report on Form 10-K. In our opinion, we have made adjustments, all of which are of a normal, recurring nature to fairly present our interim period results. Due to the seasonal nature of our business, information for interim periods may not be indicative of our operating results for the entire year. Our disclosures in this Form 10-Q are an update to those provided in our 2011 Annual Report on Form 10-K. In October, 2011, El Paso Corporation (El Paso) entered into a definitive merger agreement with Kinder Morgan, Inc. (KMI) whereby KMI will acquire El Paso in a transaction that valued El Paso at approximately $38 billion (based on the KMI stock price at that date), including the assumption of debt. In March 2012, both El Paso’s and KMI’s stockholders approved the merger agreement and a series of transactions to effectuate the merger. On May 1, 2012, KMI announced that it received approval from the Federal Trade Commission (FTC) for the merger, subject to the previously announced divestiture of certain assets. The completion of the merger transactions is expected by the end of May 2012, subject to other remaining closing conditions and regulatory approvals. Significant Accounting Policies There were no changes in the significant accounting policies described in our 2011 Annual Report on Form 10-K and no significant accounting pronouncements issued but not yet adopted as of March 31, 2012.

Basis of Presentation and Significant Accounting Policies

3 Months Ended

Mar. 31, 2012

Basis of Presentation and Significant Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

1. Basis of Presentation and Significant Accounting Policies

Basis of Presentation

We prepared this Quarterly Report on Form 10-Q under the rules and regulations of the United States Securities and Exchange Commission. As an interim period filing presented using a condensed format, it does not include all of the disclosures required by U.S. generally accepted accounting principles, and should be read along with our 2011 Annual Report on Form 10-K. The financial statements as of March 31, 2012, and for the quarters ended March 31, 2012 and 2011, are unaudited. The condensed consolidated balance sheet as of December 31, 2011, was derived from the audited balance sheet filed in our 2011 Annual Report on Form 10-K. In our opinion, we have made adjustments, all of which are of a normal, recurring nature to fairly present our interim period results. Due to the seasonal nature of our business, information for interim periods may not be indicative of our operating results for the entire year. Our disclosures in this Form 10-Q are an update to those provided in our 2011 Annual Report on Form 10-K.

In October, 2011, El Paso Corporation (El Paso) entered into a definitive merger agreement with Kinder Morgan, Inc. (KMI) whereby KMI will acquire El Paso in a transaction that valued El Paso at approximately $38 billion (based on the KMI stock price at that date), including the assumption of debt. In March 2012, both El Paso’s and KMI’s stockholders approved the merger agreement and a series of transactions to effectuate the merger. On May 1, 2012, KMI announced that it received approval from the Federal Trade Commission (FTC) for the merger, subject to the previously announced divestiture of certain assets. The completion of the merger transactions is expected by the end of May 2012, subject to other remaining closing conditions and regulatory approvals.

Significant Accounting Policies

There were no changes in the significant accounting policies described in our 2011 Annual Report on Form 10-K and no significant accounting pronouncements issued but not yet adopted as of March 31, 2012.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

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+ Details

SOUTHERN NATURAL GAS COMPANY, L.L.C. 10-Q