    <SEC-DOCUMENT>0001273813-23-000076-index.html : 20231107
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    <ACCEPTANCE-DATETIME>20231107162756
    ACCESSION NUMBER:		0001273813-23-000076
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		21
    CONFORMED PERIOD OF REPORT:	20231101
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20231107
    DATE AS OF CHANGE:		20231107

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ASSURED GUARANTY LTD
    		CENTRAL INDEX KEY:			0001273813
    		STANDARD INDUSTRIAL CLASSIFICATION:	SURETY INSURANCE [6351]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			D0
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-32141
    		FILM NUMBER:		231384349

    	BUSINESS ADDRESS:
    		STREET 1:		30 WOODBOURNE AVE
    		STREET 2:		5TH FLOOR
    		CITY:			HAMILTON BERMUDA
    		STATE:			D0
    		ZIP:			HM08
    		BUSINESS PHONE:		441-279-5700

    	MAIL ADDRESS:
    		STREET 1:		30 WOODBOURNE AVE
    		STREET 2:		5TH FLOOR
    		CITY:			HAMILTON BERMUDA
    		STATE:			D0
    		ZIP:			HM08

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	AGR LTD
    		DATE OF NAME CHANGE:	20040122

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	AGC HOLDINGS LTD
    		DATE OF NAME CHANGE:	20031218
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>ago-20231101.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: ago-20231101.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>agl3q23pressrelease.htm
    <DESCRIPTION>AGL PRESS RELEASE
    <TEXT>
    Document 2 - file: agl3q23pressrelease.htm

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    <FILENAME>agl3q23supplement.htm
    <DESCRIPTION>AGL FINANCIAL SUPPLEMENT
    <TEXT>
    Document 3 - file: agl3q23supplement.htm

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    <TYPE>EX-99.3
    <SEQUENCE>4
    <FILENAME>a8-kq32023ex993.htm
    <DESCRIPTION>EX-99.3
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    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>5
    <FILENAME>ago-20231101.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
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    <FILENAME>ago-20231101_def.xml
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    <TEXT>
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    <FILENAME>agllogoa07a.jpg
    <TEXT>
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    <FILENAME>agllogoa07b.jpg
    <TEXT>
    Document 10 - file: agllogoa07b.jpg

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    <SEQUENCE>14
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    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    Document 15 - RAW XML: ago-20231101_htm.xml

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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>16
    <FILENAME>Financial_Report.xlsx
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    <TEXT>
    Document 16 - file: Financial_Report.xlsx

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    <TYPE>XML
    <SEQUENCE>17
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    <TEXT>
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    <TYPE>XML
    <SEQUENCE>18
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    <TEXT>
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    <TYPE>XML
    <SEQUENCE>19
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    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>21
    <FILENAME>MetaLinks.json
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    <TEXT>
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    <TYPE>ZIP
    <SEQUENCE>22
    <FILENAME>0001273813-23-000076-xbrl.zip
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