    <SEC-DOCUMENT>0001193125-21-345306-index.html : 20211201
    <SEC-HEADER>0001193125-21-345306.hdr.sgml : 20211201
    <ACCEPTANCE-DATETIME>20211201160509
    ACCESSION NUMBER:		0001193125-21-345306
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		23
    CONFORMED PERIOD OF REPORT:	20211201
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20211201
    DATE AS OF CHANGE:		20211201

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CDW Corp
    		CENTRAL INDEX KEY:			0001402057
    		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-CATALOG & MAIL-ORDER HOUSES [5961]
    		IRS NUMBER:				260273989
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-35985
    		FILM NUMBER:		211462910

    	BUSINESS ADDRESS:
    		STREET 1:		200 N MILWAUKEE AVENUE
    		CITY:			VERNON HILLS
    		STATE:			IL
    		ZIP:			60061
    		BUSINESS PHONE:		847-465-6000

    	MAIL ADDRESS:
    		STREET 1:		200 N MILWAUKEE AVENUE
    		CITY:			VERNON HILLS
    		STATE:			IL
    		ZIP:			60061

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	VH Holdings, Inc.
    		DATE OF NAME CHANGE:	20070605
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>d236038d8k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: d236038d8k.htm

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    <TYPE>EX-4.2
    <SEQUENCE>2
    <FILENAME>d236038dex42.htm
    <DESCRIPTION>EX-4.2
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    Document 2 - file: d236038dex42.htm

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    <SEQUENCE>3
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    <DESCRIPTION>EX-4.4
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    Document 3 - file: d236038dex44.htm

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    <SEQUENCE>4
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    <DESCRIPTION>EX-5.2
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    Document 6 - file: d236038dex52.htm

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    <SEQUENCE>7
    <FILENAME>d236038dex53.htm
    <DESCRIPTION>EX-5.3
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    Document 7 - file: d236038dex53.htm

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    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>8
    <FILENAME>cdw-20211201.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
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    <SEQUENCE>10
    <FILENAME>cdw-20211201_pre.xml
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    <FILENAME>g236038dsp310.jpg
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    <TYPE>XML
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    <TYPE>EXCEL
    <SEQUENCE>18
    <FILENAME>Financial_Report.xlsx
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    Document 18 - file: Financial_Report.xlsx

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    <SEQUENCE>21
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    <TYPE>JSON
    <SEQUENCE>24
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