    <SEC-DOCUMENT>0000929008-17-000027-index.html : 20171026
    <SEC-HEADER>0000929008-17-000027.hdr.sgml : 20171026
    <ACCEPTANCE-DATETIME>20171026060627
    ACCESSION NUMBER:		0000929008-17-000027
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		27
    CONFORMED PERIOD OF REPORT:	20171026
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20171026
    DATE AS OF CHANGE:		20171026

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			WESCO INTERNATIONAL INC
    		CENTRAL INDEX KEY:			0000929008
    		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-ELECTRICAL APPARATUS & EQUIPMENT, WIRING SUPPLIES [5063]
    		IRS NUMBER:				251723342
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-14989
    		FILM NUMBER:		171154603

    	BUSINESS ADDRESS:
    		STREET 1:		225 WEST STATION SQUARE DRIVE
    		STREET 2:		STE 700
    		CITY:			PITTSBURGH
    		STATE:			PA
    		ZIP:			15219
    		BUSINESS PHONE:		4124542200

    	MAIL ADDRESS:
    		STREET 1:		225 WEST STATION SQUARE DRIVE
    		STREET 2:		STE 700
    		CITY:			PITTSBURGH
    		STATE:			PA
    		ZIP:			15219

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CDW HOLDING CORP
    		DATE OF NAME CHANGE:	19971217
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>wcc-3q2017earnings8k.htm
    <DESCRIPTION>FORM 8-K
    <TEXT>
    Document 1 - file: wcc-3q2017earnings8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>wcc-3q2017earningsrelease.htm
    <DESCRIPTION>NEWS RELEASE
    <TEXT>
    Document 2 - file: wcc-3q2017earningsrelease.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>wcc-3q2017webcast.htm
    <DESCRIPTION>SLIDE PRESENTATION
    <TEXT>
    Document 3 - file: wcc-3q2017webcast.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>wcc-3q2017webcast001.jpg
    <TEXT>
    Document 4 - file: wcc-3q2017webcast001.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>wcc-3q2017webcast002.jpg
    <TEXT>
    Document 5 - file: wcc-3q2017webcast002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>wcc-3q2017webcast003.jpg
    <TEXT>
    Document 6 - file: wcc-3q2017webcast003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>wcc-3q2017webcast004.jpg
    <TEXT>
    Document 7 - file: wcc-3q2017webcast004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>wcc-3q2017webcast005.jpg
    <TEXT>
    Document 8 - file: wcc-3q2017webcast005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>wcc-3q2017webcast006.jpg
    <TEXT>
    Document 9 - file: wcc-3q2017webcast006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>wcc-3q2017webcast007.jpg
    <TEXT>
    Document 10 - file: wcc-3q2017webcast007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>wcc-3q2017webcast008.jpg
    <TEXT>
    Document 11 - file: wcc-3q2017webcast008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>wcc-3q2017webcast009.jpg
    <TEXT>
    Document 12 - file: wcc-3q2017webcast009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>wcc-3q2017webcast010.jpg
    <TEXT>
    Document 13 - file: wcc-3q2017webcast010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>wcc-3q2017webcast011.jpg
    <TEXT>
    Document 14 - file: wcc-3q2017webcast011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>wcc-3q2017webcast012.jpg
    <TEXT>
    Document 15 - file: wcc-3q2017webcast012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>wcc-3q2017webcast013.jpg
    <TEXT>
    Document 16 - file: wcc-3q2017webcast013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>wcc-3q2017webcast014.jpg
    <TEXT>
    Document 17 - file: wcc-3q2017webcast014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>wcc-3q2017webcast015.jpg
    <TEXT>
    Document 18 - file: wcc-3q2017webcast015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>wcc-3q2017webcast016.jpg
    <TEXT>
    Document 19 - file: wcc-3q2017webcast016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>wcc-3q2017webcast017.jpg
    <TEXT>
    Document 20 - file: wcc-3q2017webcast017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>wcc-3q2017webcast018.jpg
    <TEXT>
    Document 21 - file: wcc-3q2017webcast018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>wcc-3q2017webcast019.jpg
    <TEXT>
    Document 22 - file: wcc-3q2017webcast019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>wcc-3q2017webcast020.jpg
    <TEXT>
    Document 23 - file: wcc-3q2017webcast020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>wcc-3q2017webcast021.jpg
    <TEXT>
    Document 24 - file: wcc-3q2017webcast021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>wcc-3q2017webcast022.jpg
    <TEXT>
    Document 25 - file: wcc-3q2017webcast022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>wcc-3q2017webcast023.jpg
    <TEXT>
    Document 26 - file: wcc-3q2017webcast023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>wescointllogoa80.jpg
    <TEXT>
    Document 27 - file: wescointllogoa80.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>