v2.4.0.8
Document and Entity Information
9 Months Ended
Sep. 30, 2014
Document And Entity Information [Abstract]  
Document Type 10-Q
Amendment Flag false
Document Period End Date Sep. 30, 2014
Document Fiscal Year Focus 2014
Document Fiscal Period Focus Q3
Trading Symbol AMBC
Entity Registrant Name AMBAC FINANCIAL GROUP INC
Entity Central Index Key 0000874501
Current Fiscal Year End Date --12-31
Entity Filer Category Large Accelerated Filer
Entity Common Stock, Shares Outstanding 45,002,575