    <SEC-DOCUMENT>0001084048-20-000032-index.html : 20200706
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    <ACCEPTANCE-DATETIME>20200702191643
    ACCESSION NUMBER:		0001084048-20-000032
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		19
    CONFORMED PERIOD OF REPORT:	20200702
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20200706
    DATE AS OF CHANGE:		20200702

    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:		201011571

    	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-20200702.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: jcom-20200702.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>exhibit991pressrelease.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: exhibit991pressrelease.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>jcom-20200702.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 3 - file: jcom-20200702.xsd

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    <SEQUENCE>4
    <FILENAME>jcom-20200702_cal.xml
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    <FILENAME>jcom-20200702_def.xml
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    <TEXT>
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    <TYPE>EX-101.LAB
    <SEQUENCE>6
    <FILENAME>jcom-20200702_lab.xml
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    <TEXT>
    Document 6 - file: jcom-20200702_lab.xml

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>exhibit991pressrelease001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>exhibit991pressrelease002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>exhibit991pressrelease003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: exhibit991pressrelease003.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>jcom-20200702_g1.jpg
    <TEXT>
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    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>jcom-20200702_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <FILENAME>R1.htm
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    <TEXT>
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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>14
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 14 - file: Financial_Report.xlsx

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>15
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: Show.js

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    <TYPE>XML
    <SEQUENCE>16
    <FILENAME>report.css
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    <TEXT>
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    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>FilingSummary.xml
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    <TEXT>
    Document 17 - file: FilingSummary.html

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    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>19
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 19 - file: MetaLinks.json

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    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>20
    <FILENAME>0001084048-20-000032-xbrl.zip
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    <TEXT>
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