Note 9 - Subsequent Event	9 Months Ended
Sep. 30, 2012
Subsequent Events [Text Block]	Note 9 - Subsequent Event We monitor significant events occurring after the balance sheet date and prior to the issuance of the financial statements to determine the impacts, if any, of events on the financial statements to be issued. The only material subsequent event of which we are aware is as follows: On October 26, 2012, Nicor Gas effected a supplemental indenture (the “Supplemental Indenture”) to the Indenture, dated January 1, 1954 (the “Indenture”), governing all of our outstanding series of First Mortgage Bonds. The Supplemental Indenture amends the Indenture to remove the Indenture’s requirement that we file periodic reports with the SEC and replaces this requirement with a requirement that, in the event we are not otherwise required to file reports with the SEC, we will supplementally make available quarterly and annual financial information to holders and potential purchasers of the First Mortgage Bonds. This summary of the Supplemental Indenture is qualified by reference to the Supplemental Indenture, a copy of which is filed as Exhibit 4.1 to this Quarterly Report and incorporated herein by reference. Item 3. Quantitative and Qualitative Disclosures About Market Risk

Note 9 - Subsequent Event

9 Months Ended

Sep. 30, 2012

Note 9 - Subsequent Event

We monitor significant events occurring after the balance sheet date and prior to the issuance of the financial statements to determine the impacts, if any, of events on the financial statements to be issued. The only material subsequent event of which we are aware is as follows:

On October 26, 2012, Nicor Gas effected a supplemental indenture (the “Supplemental Indenture”) to the Indenture, dated January 1, 1954 (the “Indenture”), governing all of our outstanding series of First Mortgage Bonds. The Supplemental Indenture amends the Indenture to remove the Indenture’s requirement that we file periodic reports with the SEC and replaces this requirement with a requirement that, in the event we are not otherwise required to file reports with the SEC, we will supplementally make available quarterly and annual financial information to holders and potential purchasers of the First Mortgage Bonds. This summary of the Supplemental Indenture is qualified by reference to the Supplemental Indenture, a copy of which is filed as Exhibit 4.1 to this Quarterly Report and incorporated herein by reference.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

NORTHERN ILLINOIS GAS CO /IL/ /NEW/ 10-Q