XML 150 R92.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Fair Value Measurements - Information about Valuation Inputs for Variable Interest Entity Assets and Liabilities Classified as Level 3 (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2013 Successor Ambac [Member] European ABS Transactions [Member] | Dec. 31, 2013 Successor Ambac [Member] US Commercial ABS Transaction [Member] | Dec. 31, 2012 Predecessor Ambac [Member] European ABS Transactions [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |
Coupon rate | 0.72% | 6.11% | 1.64%
Maturity | 17 years 10 months 10 days | 6 years 9 months 29 days | 12 years 4 months 2 days
Yield | 1.10% | 11.95% | 4.02%

X
- Definition Fair value inputs coupon rate. + References No definition available. + Details
Name: | ambc_FairValueInputsCouponRate
Namespace Prefix: | ambc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value inputs maturity. + References No definition available. + Details
Name: | ambc_FairValueInputsMaturity
Namespace Prefix: | ambc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value inputs yield. + References No definition available. + Details
Name: | ambc_FairValueInputsYield
Namespace Prefix: | ambc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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