    <SEC-DOCUMENT>0000935036-22-000032-index.html : 20221102
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    <ACCEPTANCE-DATETIME>20221102090457
    ACCESSION NUMBER:		0000935036-22-000032
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		30
    CONFORMED PERIOD OF REPORT:	20221102
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20221102
    DATE AS OF CHANGE:		20221102

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ACI WORLDWIDE, INC.
    		CENTRAL INDEX KEY:			0000935036
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
    		IRS NUMBER:				470772104
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-25346
    		FILM NUMBER:		221352438

    	BUSINESS ADDRESS:
    		STREET 1:		3520 KRAFT ROAD, SUITE 300
    		CITY:			NAPLES
    		STATE:			FL
    		ZIP:			34105
    		BUSINESS PHONE:		239-403-4600

    	MAIL ADDRESS:
    		STREET 1:		3520 KRAFT ROAD, SUITE 300
    		CITY:			NAPLES
    		STATE:			FL
    		ZIP:			34105

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	TRANSACTION SYSTEMS ARCHITECTS INC
    		DATE OF NAME CHANGE:	19950109
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>aciw-20221102.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: aciw-20221102.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>aciw-20221102_exx991.htm
    <DESCRIPTION>EX-99.1
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    Document 2 - file: aciw-20221102_exx991.htm

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    <DOCUMENT>
    <TYPE>EX-99.2
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    <FILENAME>aciw-20221102_ex992.htm
    <DESCRIPTION>EX-99.2
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    Document 3 - file: aciw-20221102_ex992.htm

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    <TYPE>EX-101.SCH
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    <FILENAME>aciw-20221102.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
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    Document 4 - file: aciw-20221102.xsd

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    Document 5 - file: aciw-20221102_def.xml

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    <SEQUENCE>6
    <FILENAME>aciw-20221102_lab.xml
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    <FILENAME>aciw-20221102_ex992001.jpg
    <DESCRIPTION>GRAPHIC
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    <FILENAME>aciw-20221102_ex992002.jpg
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    Document 9 - file: aciw-20221102_ex992002.jpg

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    <FILENAME>aciw-20221102_ex992003.jpg
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    Document 10 - file: aciw-20221102_ex992003.jpg

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    <FILENAME>aciw-20221102_ex992004.jpg
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    Document 11 - file: aciw-20221102_ex992004.jpg

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    <FILENAME>aciw-20221102_ex992005.jpg
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    Document 12 - file: aciw-20221102_ex992005.jpg

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    <FILENAME>aciw-20221102_ex992007.jpg
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    Document 14 - file: aciw-20221102_ex992007.jpg

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    <FILENAME>aciw-20221102_ex992008.jpg
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    Document 15 - file: aciw-20221102_ex992008.jpg

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    <FILENAME>aciw-20221102_ex992009.jpg
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    <FILENAME>aciw-20221102_ex992010.jpg
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    Document 17 - file: aciw-20221102_ex992010.jpg

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    <SEQUENCE>18
    <FILENAME>aciw-20221102_ex992011.jpg
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    Document 18 - file: aciw-20221102_ex992011.jpg

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    <FILENAME>aciw-20221102_ex992012.jpg
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    Document 19 - file: aciw-20221102_ex992012.jpg

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    <FILENAME>aciw-20221102_ex992013.jpg
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    Document 20 - file: aciw-20221102_ex992013.jpg

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    <FILENAME>aciw-20221102_ex992014.jpg
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    Document 21 - file: aciw-20221102_ex992014.jpg

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    <SEQUENCE>22
    <FILENAME>aciw-logo.jpg
    <DESCRIPTION>ACI LOGO
    <TEXT>
    Document 22 - file: aciw-logo.jpg

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    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 23 - file: R1.htm

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    Document 24 - RAW XML: aciw-20221102_htm.xml

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    <TYPE>EXCEL
    <SEQUENCE>25
    <FILENAME>Financial_Report.xlsx
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    <TEXT>
    Document 25 - file: Financial_Report.xlsx

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    <SEQUENCE>26
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    <TEXT>
    Document 26 - file: Show.js

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    <SEQUENCE>27
    <FILENAME>report.css
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    <TEXT>
    Document 27 - file: report.css

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    <TYPE>XML
    <SEQUENCE>28
    <FILENAME>FilingSummary.xml
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    Document 28 - file: FilingSummary.html

    Document 28 - RAW XML: FilingSummary.xml

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    <TYPE>JSON
    <SEQUENCE>30
    <FILENAME>MetaLinks.json
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    Document 30 - file: MetaLinks.json

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    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>31
    <FILENAME>0000935036-22-000032-xbrl.zip
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    Document 31 - file: 0000935036-22-000032-xbrl.zip

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