    <SEC-DOCUMENT>0001084048-20-000025-index.html : 20200511
    <SEC-HEADER>0001084048-20-000025.hdr.sgml : 20200511
    <ACCEPTANCE-DATETIME>20200511163331
    ACCESSION NUMBER:		0001084048-20-000025
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		34
    CONFORMED PERIOD OF REPORT:	20200511
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
    ITEM INFORMATION:		Submission of Matters to a Vote of Security Holders
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20200511
    DATE AS OF CHANGE:		20200511

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			J2 GLOBAL, INC.
    		CENTRAL INDEX KEY:			0001084048
    		STANDARD INDUSTRIAL CLASSIFICATION:	TELEGRAPH & OTHER MESSAGE COMMUNICATIONS [4822]
    		IRS NUMBER:				471053457
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-25965
    		FILM NUMBER:		20865376

    	BUSINESS ADDRESS:
    		STREET 1:		700 S FLOWER STREET
    		STREET 2:		LEGAL DEPT - 15TH FLOOR
    		CITY:			LOS ANGELES
    		STATE:			CA
    		ZIP:			90017
    		BUSINESS PHONE:		3238609200

    	MAIL ADDRESS:
    		STREET 1:		700 S FLOWER STREET
    		STREET 2:		LEGAL DEPT - 15TH FLOOR
    		CITY:			LOS ANGELES
    		STATE:			CA
    		ZIP:			90017

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	J2 GLOBAL COMMUNICATIONS INC
    		DATE OF NAME CHANGE:	20001221

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	JFAX COM INC
    		DATE OF NAME CHANGE:	19990413
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>jcom-20200511.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: jcom-20200511.htm

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    <DOCUMENT>
    <TYPE>EX-3.2
    <SEQUENCE>2
    <FILENAME>jcomexhibit32q120.htm
    <DESCRIPTION>EX-3.2
    <TEXT>
    Document 2 - file: jcomexhibit32q120.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>3
    <FILENAME>pressreleaseq12020.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 3 - file: pressreleaseq12020.htm

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    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>4
    <FILENAME>earningscallq12020final.htm
    <DESCRIPTION>EX-99.2
    <TEXT>
    Document 4 - file: earningscallq12020final.htm

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    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>5
    <FILENAME>jcom-20200511.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 5 - file: jcom-20200511.xsd

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    <FILENAME>jcom-20200511_cal.xml
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    <FILENAME>jcom-20200511_lab.xml
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    Document 9 - file: jcom-20200511_pre.xml

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    <SEQUENCE>10
    <FILENAME>earningscallq12020final001.jpg
    <TEXT>
    Document 10 - file: earningscallq12020final001.jpg

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    Document 12 - file: earningscallq12020final003.jpg

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    <FILENAME>earningscallq12020final010.jpg
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    <FILENAME>earningscallq12020final011.jpg
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    Document 20 - file: earningscallq12020final011.jpg

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    Document 23 - file: earningscallq12020final014.jpg

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    <SEQUENCE>24
    <FILENAME>earningscallq12020final015.jpg
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    Document 24 - file: earningscallq12020final015.jpg

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    <FILENAME>earningscallq12020final016.jpg
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    Document 25 - file: earningscallq12020final016.jpg

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    <SEQUENCE>26
    <FILENAME>jcom-20200511_g1.jpg
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    <SEQUENCE>27
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    <DESCRIPTION>IDEA: XBRL DOCUMENT
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    <TYPE>JSON
    <SEQUENCE>28
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 28 - file: MetaLinks.json

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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>29
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 29 - file: Financial_Report.xlsx

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    <SEQUENCE>30
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    <TYPE>XML
    <SEQUENCE>31
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    Document 31 - file: FilingSummary.html

    Document 31 - RAW XML: FilingSummary.xml

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    <SEQUENCE>32
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    Document 32 - file: Show.js

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    <SEQUENCE>36
    <FILENAME>report.css
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    Document 36 - file: report.css

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