XML 47 R31.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Income Taxes (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2013
Income Tax Disclosure [Abstract] |
Major Jurisdictions | The following are the major jurisdictions in which Ambac and its affiliates operate and the earliest tax years subject to examination:
Jurisdiction |  | Tax Year |
United States |  |  | 2010 |
New York State |  |  | 2008 |
New York City |  |  | 2011 |
United Kingdom |  |  | 2006 |
Italy |  |  | 2007 |

X
- Definition Schedule of tax years subject to examination by major jurisdictions. + References No definition available. + Details
Name: | ambc_ScheduleOfTaxYearsSubjectToExaminationByMajorJurisdictionsTableTextBlock
Namespace Prefix: | ambc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration