Other Income and Expenses	12 Months Ended
Dec. 31, 2011
Other Income and Expenses [Abstract]
OTHER INCOME AND EXPENSES	10. OTHER INCOME AND EXPENSES. During 2011, we capitalized $10.1 million of project feasibility costs associated with the Northeast Supply Link Expansion Project, which were previously expensed in Other (income) expenses, net, upon determining that the project was probable of development. These costs will be included in the capital costs of the project, which we believe are probable of recovery through the project rates. We detected a leak in an underground cavern at our Eminence Storage Field in Mississippi on December 28, 2010. During 2011 and 2010, we recorded $14.6 million and $2.0 million, respectively, of charges to Operation and maintenance expenses primarily related to costs to ensure the safety of the surrounding area. In 2010, we also recorded $2.5 million related to gas loss in Cost of natural gas transportation.

The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 3, 6, 7, 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3,6,7,9)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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