Other Income and Expenses	12 Months Ended
Dec. 31, 2012
OtherIncomeAndExpensesAbstract
OtherIncomeAndOtherExpenseDisclosureTextBlock	10. OTHER INCOME AND EXPENSES. During 2012, we capitalized $8.7 million and $2.4 million, respectively, of project feasibility costs associated with the Rockaway Delivery Lateral Project and the Northeast Connector Project, which had been expensed in prior periods in Other (income) expenses, net, upon determining that the projects were probable of development. During 2011, we capitalized $10.1 million of project feasibility costs associated with the Northeast Supply Link Expansion Project, which had been expensed in prior periods 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 projects, which we believe are probable of recovery through the projects' rates. We detected a leak in an underground cavern at our Eminence Storage Field in Mississippi on December 28, 2010. During 2012, 2011 and 2010, we recorded $2.5 million, $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.

Other Income and Expenses

12 Months Ended

Dec. 31, 2012

OtherIncomeAndOtherExpenseDisclosureTextBlock

10. OTHER INCOME AND EXPENSES.

During 2012, we capitalized $8.7 million and $2.4 million, respectively, of project feasibility costs associated with the Rockaway Delivery Lateral Project and the Northeast Connector Project, which had been expensed in prior periods in Other (income) expenses, net, upon determining that the projects were probable of development. During 2011, we capitalized $10.1 million of project feasibility costs associated with the Northeast Supply Link Expansion Project, which had been expensed in prior periods 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 projects, which we believe are probable of recovery through the projects' rates.

We detected a leak in an underground cavern at our Eminence Storage Field in Mississippi on December 28, 2010. During 2012, 2011 and 2010, we recorded $2.5 million, $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.