2.2.0.7 false Basis of Accounting Presentation 0201 - Disclosure - Basis of Accounting Presentation true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Basis of Accounting Presentation [Abstract] 0 us-gaap_GeneralPoliciesAbstract us-gaap true 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 Basis of Accounting Presentation 1 us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <div align="left" style="font-family: 'Times New Roman',Times,serif">   <div align="justify" style="font-size: 10pt; margin-top: 0pt"><u></u><u></u> </div> <div align="justify" style="font-size: 10pt; margin-top: 0pt"><font style="font-variant: small-caps"><b></b></font> </div> <div align="justify"> </div> <div align="justify" style="font-size: 10pt; margin-top: 0pt"><b></b> </div> <div align="justify" style="font-size: 10pt; margin-top: 12pt"><b>1.</b>            <b>Basis of Accounting Presentation</b> </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">The accompanying unaudited condensed consolidated financial statements for NiSource reflect all normal recurring adjustments that are necessary, in the opinion of management, to present fairly the results of operations in accordance with GAAP in the United States of America. </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">The accompanying financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in NiSource’s Annual Report on Form 10-K for the fiscal year ended December 31, 2009. Income for interim periods may not be indicative of results for the calendar year due to weather variations and other factors. </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">The unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC. Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although NiSource believes that the disclosures made are adequate to make the information not misleading. </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">At December 31, 2009, certain assets totaling $61.5 million were recorded in “Other property at cost less accumulated depreciation.” NiSource has corrected the classification of these assets as “Utility Plant” in the Condensed Consolidated Balance Sheets as of June 30, 2010 (unaudited) and December 31, 2009. </div> </div>  <!-- Begin Block Tagged Note false false false us-types:textBlockItemType textblock Description containing the entire organization, consolidation and basis of presentation of financial statements disclosure. May be provided in more than one note to the financial statements, as long as users are provided with an understanding of (1) the significant judgments and assumptions made by an enterprise in determining whether it must consolidate a VIE and/or disclose information about its involvement with a VIE, (2) the nature of restrictions on a consolidated VIE's assets reported by an enterprise in its statement of financial position, including the carrying amounts of such assets, (3) the nature of, and changes in, the risks associated with an enterprise's involvement with the VIE, and (4) how an enterprise's involvement with the VIE affects the enterprise's financial position, financial performance, and cash flows. Describes procedure if disclosures are provided in more than one note to the financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS140-4 and FIN46(R)-8 -Paragraph 8, C1, C7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 2-6 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-6 -Paragraph 10 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 46R -Paragraph 4, 14, 15 false 1 2 false UnKnown UnKnown UnKnown false true