    <SEC-DOCUMENT>0001157523-20-000199-index.html : 20200213
    <SEC-HEADER>0001157523-20-000199.hdr.sgml : 20200213
    <ACCEPTANCE-DATETIME>20200213084545
    ACCESSION NUMBER:		0001157523-20-000199
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		35
    CONFORMED PERIOD OF REPORT:	20200213
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20200213
    DATE AS OF CHANGE:		20200213

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			WEX Inc.
    		CENTRAL INDEX KEY:			0001309108
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
    		IRS NUMBER:				010526993
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-32426
    		FILM NUMBER:		20607158

    	BUSINESS ADDRESS:
    		STREET 1:		97 DARLING AVENUE
    		CITY:			SOUTH PORTLAND
    		STATE:			ME
    		ZIP:			04106
    		BUSINESS PHONE:		(207) 773-8171

    	MAIL ADDRESS:
    		STREET 1:		97 DARLING AVENUE
    		CITY:			SOUTH PORTLAND
    		STATE:			ME
    		ZIP:			04106

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Wright Express CORP
    		DATE OF NAME CHANGE:	20041118
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>a52173037.htm
    <DESCRIPTION>WEX INC. 8-K
    <TEXT>
    Document 1 - file: a52173037.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>a52173037ex99_1.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: a52173037ex99_1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>wex-20200213.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 3 - file: wex-20200213.xsd

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    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>wex-20200213_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
    Document 4 - file: wex-20200213_lab.xml

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    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>wex-20200213_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
    <TEXT>
    Document 5 - file: wex-20200213_pre.xml

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    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>a52173037ex99_1slide1.jpg
    <TEXT>
    Document 6 - file: a52173037ex99_1slide1.jpg

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    <TEXT>
    Document 7 - file: a52173037ex99_1slide2.jpg

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    <SEQUENCE>9
    <FILENAME>a52173037ex99_1slide4.jpg
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    Document 9 - file: a52173037ex99_1slide4.jpg

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    Document 11 - file: a52173037ex99_1slide6.jpg

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    <FILENAME>a52173037ex99_1slide7.jpg
    <TEXT>
    Document 12 - file: a52173037ex99_1slide7.jpg

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    Document 13 - file: a52173037ex99_1slide8.jpg

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    Document 18 - file: a52173037ex99_1slide13.jpg

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    <SEQUENCE>19
    <FILENAME>a52173037ex99_1slide14.jpg
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    Document 19 - file: a52173037ex99_1slide14.jpg

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    <SEQUENCE>21
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    <SEQUENCE>22
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    <SEQUENCE>23
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    Document 23 - file: a52173037ex99_1slide18.jpg

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    Document 24 - file: a52173037ex99_1slide19.jpg

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    Document 25 - file: a52173037ex99_1slide20.jpg

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    <SEQUENCE>26
    <FILENAME>a52173037ex99_1slide21.jpg
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    Document 26 - file: a52173037ex99_1slide21.jpg

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

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>28
    <FILENAME>FilingSummary.xml
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    <SEQUENCE>29
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    <TYPE>XML
    <SEQUENCE>30
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    Document 30 - file: Show.js

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>31
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    <TEXT>
    Document 31 - file: report.css

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    <TYPE>XML
    <SEQUENCE>32
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    Document 32 - RAW XML: a52173037_htm.xml

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    <TYPE>JSON
    <SEQUENCE>34
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
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    Document 34 - file: MetaLinks.json

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    <TYPE>XML
    <SEQUENCE>35
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    Document 35 - file: R1.htm

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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>36
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 36 - file: Financial_Report.xlsx

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