    <SEC-DOCUMENT>0001193125-24-174116-index.html : 20240702
    <SEC-HEADER>0001193125-24-174116.hdr.sgml : 20240702
    <ACCEPTANCE-DATETIME>20240702123216
    ACCESSION NUMBER:		0001193125-24-174116
    CONFORMED SUBMISSION TYPE:	N-CSRS
    PUBLIC DOCUMENT COUNT:		3
    CONFORMED PERIOD OF REPORT:	20240430
    FILED AS OF DATE:		20240702
    DATE AS OF CHANGE:		20240702
    EFFECTIVENESS DATE:		20240702

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Nuveen AMT-Free Municipal Credit Income Fund
    		CENTRAL INDEX KEY:			0001090116
    		ORGANIZATION NAME:
    		IRS NUMBER:				752998730
    		STATE OF INCORPORATION:			MA
    		FISCAL YEAR END:			1031

    	FILING VALUES:
    		FORM TYPE:		N-CSRS
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-09475
    		FILM NUMBER:		241093768

    	BUSINESS ADDRESS:
    		STREET 1:		333 WEST WACKER DRIVE
    		CITY:			CHICAGO
    		STATE:			IL
    		ZIP:			60606
    		BUSINESS PHONE:		3129178146

    	MAIL ADDRESS:
    		STREET 1:		333 WEST WACKER DRIVE
    		CITY:			CHICAGO
    		STATE:			IL
    		ZIP:			60606

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Nuveen Enhanced AMT-Free Municipal Credit Opportunities Fund
    		DATE OF NAME CHANGE:	20160411

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	NUVEEN DIVIDEND ADVANTAGE MUNICIPAL INCOME FUND
    		DATE OF NAME CHANGE:	20120106

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	NUVEEN INSURED DIVIDEND ADVANTAGE MUNICIPAL FUND
    		DATE OF NAME CHANGE:	19990709
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>N-CSRS
    <SEQUENCE>1
    <FILENAME>d827402dncsrs.htm
    <DESCRIPTION>NUVEEN AMT-FREE MUNICIPAL CREDIT INCOME FUND
    <TEXT>
    Document 1 - file: d827402dncsrs.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CERT
    <SEQUENCE>2
    <FILENAME>d827402dex99cert.htm
    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT
    <TEXT>
    Document 2 - file: d827402dex99cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.906CERT
    <SEQUENCE>3
    <FILENAME>d827402dex99906cert.htm
    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT
    <TEXT>
    Document 3 - file: d827402dex99906cert.htm

    </DOCUMENT>
    </SEC-DOCUMENT>