Soliciting Material Soliciting Material Written Communications Written Communications Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] Amendment Flag Amendment Flag Assured Guaranty US Holdings Inc. 3.600% Senior Notes due 2051 Assured Guaranty US Holdings Inc. 3.600% Senior Notes due 2051 [Member] Assured Guaranty US Holdings Inc. 3.600% Senior Notes due 2051 Entity Emerging Growth Company Entity Emerging Growth Company Entity File Number Entity File Number Security Exchange Name Security Exchange Name Entity Address, Country Entity Address, Country Entity Address, Address Line One Entity Address, Address Line One City Area Code City Area Code Cover [Abstract] Cover [Abstract] Entity Information [Line Items] Entity Information [Line Items] Document Period End Date Document Period End Date Exchange [Domain] Exchange [Domain] Pre-commencement Tender Offer Pre-commencement Tender Offer Class of Stock [Axis] Class of Stock [Axis] Entity Central Index Key Entity Central Index Key Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Tax Identification Number Entity Tax Identification Number Entities [Table] Entities [Table] Entity Registrant Name Entity Registrant Name Assured Guaranty US Holdings Inc. 3.150% Senior Notes due 2031 Assured Guaranty US Holdings Inc. 3.150% Senior Notes due 2031 [Member] Assured Guaranty US Holdings Inc. 3.150% Senior Notes due 2031 Trading Symbol Trading Symbol Common Shares Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Assured Guaranty US Holdings Inc. 6.125% Senior Notes Due 2028 Assured Guaranty US Holdings Inc. 6.125% Senior Notes Due 2028 [Member] Assured Guaranty US Holdings Inc. 6.125% Senior Notes Due 2028 Title of 12(b) Security Title of 12(b) Security Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Address, City or Town Entity Address, City or Town New York Stock Exchange NEW YORK STOCK EXCHANGE, INC. [Member] Document Type Document Type