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Document And Entity Information | 6 Months Ended |
--- | --- | ---
Jun. 30, 2011 | Jul. 31, 2011
Document And Entity Information |  |
Document Type | 10-Q |
Amendment Flag | false |
Document Period End Date | Jun. 30, 2011 |
Document Fiscal Year Focus | 2011 |
Document Fiscal Period Focus | Q2 |
Entity Registrant Name | AMBAC FINANCIAL GROUP INC |
Entity Central Index Key | 0000874501 |
Current Fiscal Year End Date | --12-31 |
Entity Filer Category | Accelerated Filer |
Entity Common Stock, Shares Outstanding |  | 302,428,811

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