2.2.0.7 false EQUITY INVESTMENT INCOME, NET 006110 - Disclosure - EQUITY INVESTMENT INCOME, NET true false false false 1 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u002 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 u001 Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Notes to Financial Statements [Abstract] 0 gas_NotesToFinancialStatementsAbstract gas false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 EQUITY INVESTMENT INCOME, NET 1 us-gaap_EquityMethodInvestmentsTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false false false false 0 0 <div> <div style="LINE-HEIGHT: 1.5"> <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent_0" width="100%" style="FONT-SIZE: 10pt; LINE-HEIGHT: 1.5; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr valign="top" style="LINE-HEIGHT: 1.5;"> <td style="WIDTH: 27pt; LINE-HEIGHT: 1.5"> <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">9.</font></div> </td> <td style="LINE-HEIGHT: 1.5"> <div style="LINE-HEIGHT: 1.5" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">EQUITY INVESTMENT INCOME, NET</font></div> </td> </tr></table> </div> <div style="DISPLAY: block; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5"><br /></div> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Equity investment income includes investment income from Triton of $1.8 million and $3.2 million for the three and six months ended June 30, 2010, respectively, and $1.3 million and $2.5 million, for the same periods in 2009.  Nicor received cash distributions from equity investees for the three and six months ended June 30, 2010 of $5.4 million and $7.9 million, respectively, and $3.7 million and $6.5 million, respectively, for the same periods in 2009.  On March 31, 2009, the company sold its 50-percent interest in EN Engineering.  The company’s share of the sale price was $16.0 million, with an additional $1.5 million which is contingent on EN Engineering’s 2010 performance and would be due in 2011.  After closing costs and other adjustments, Nicor received cash of $13.0 million and recorded a gain on the sale of $10.1 million.</font></div> </div> 9. EQUITY INVESTMENT INCOME, NET Equity investment income includes false false false us-types:textBlockItemType textblock This item represents disclosure of information related to equity method investments in common stock. The information which should be considered for disclosure includes: (a) the name of each investee or group of investments for which combined disclosure is appropriate, (2) the percentage ownership of common stock, (3) the difference, if any, between the carrying amount of an investment and the value of the underlying equity in the net assets and the accounting treatment of difference, if any, and (4) the aggregate value of each identified investment based on its quoted market price, if available. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a, b false 1 2 false UnKnown UnKnown UnKnown false true