    <SEC-DOCUMENT>0001111711-18-000032-index.html : 20180801
    <SEC-HEADER>0001111711-18-000032.hdr.sgml : 20180801
    <ACCEPTANCE-DATETIME>20180801063151
    ACCESSION NUMBER:		0001111711-18-000032
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		3
    CONFORMED PERIOD OF REPORT:	20180801
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20180801
    DATE AS OF CHANGE:		20180801

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			NISOURCE INC/DE
    		CENTRAL INDEX KEY:			0001111711
    		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
    		IRS NUMBER:				352108964
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-16189
    		FILM NUMBER:		18982945

    	BUSINESS ADDRESS:
    		STREET 1:		801 EAST 86TH AVE
    		CITY:			MERRILLVILLE
    		STATE:			IN
    		ZIP:			46410-6272
    		BUSINESS PHONE:		2196475200

    	MAIL ADDRESS:
    		STREET 1:		801 EAST 86TH AVE
    		CITY:			MERRILLVILLE
    		STATE:			IN
    		ZIP:			46410-6272

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	NEW NISOURCE INC
    		DATE OF NAME CHANGE:	20000412
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>a8-kheaderq22018.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a8-kheaderq22018.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>ni-ex991_2018630.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: ni-ex991_2018630.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>nierheadera21.jpg
    <TEXT>
    Document 3 - file: nierheadera21.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>