XML 137 R107.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Insurance in Force (Narrative) (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Guarantor Obligations [Line Items] |  |  |
Transactions guaranteed by MBIA on behalf of various investment management service affiliates | $ 2,600,000,000 mbi_TransactionsGuaranteedOnBehalfOfVariousAffiliates | $ 3,500,000,000 mbi_TransactionsGuaranteedOnBehalfOfVariousAffiliates |
Guarantees of derivative contracts, maturity range, minimum (Years) | 1 year 0 months 0 days |  |
Guarantees of derivative contracts, maturity range, maximum (Years) | 68 years 0 months 0 days |  |
Derivative Liabilities | 246,000,000 us-gaap_DerivativeLiabilities | 1,200,000,000 us-gaap_DerivativeLiabilities |
Amount available under these letters of credit and trust arrangements | 34,000,000 mbi_ReinsuranceRecoverablesSecuredByLettersOfCreditAmount |  |
Aggregate amount of insurance in force ceded to reinsurers | 11,100,000,000 mbi_AggregateAmountInsuranceInForceOutstandingCededToReinsurers | 12,700,000,000 mbi_AggregateAmountInsuranceInForceOutstandingCededToReinsurers |
Aggregate amount of insured par outstanding ceded to reinsurers | 6,087,000,000 mbi_AggregateAmountOfInsuredParOutstandingCededToReinsurers | 7,100,000,000 mbi_AggregateAmountOfInsuredParOutstandingCededToReinsurers |
Recoveries received on claims for financial guarantee policies under reinsurance contracts | (5,000,000)us-gaap_InsuranceRecoveries | 4,000,000 us-gaap_InsuranceRecoveries | 4,000,000 us-gaap_InsuranceRecoveries
Ceding commissions from reinsurance | 2,000,000 us-gaap_FeesAndCommissionsOther | 2,000,000 us-gaap_FeesAndCommissionsOther | 3,000,000 us-gaap_FeesAndCommissionsOther
Guarantees Of Derivative Contracts [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantee Obligations Maximum Exposure | $ 10,100,000,000 us-gaap_GuaranteeObligationsMaximumExposure / us-gaap_GuaranteeObligationsByNatureAxis = mbi_GuaranteesOfDerivativeContractsMember |  |
Minimum [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Insurance in force, expected maturity range, years | 1 year 0 months 0 days |  |
Minimum [Member] | Investment Agreement Contracts and MTNs [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Future guarantee payments, maturity range, (years) | 1 year 0 months 0 days |  |
Maximum [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Insurance in force, expected maturity range, years | 43 years 0 months 0 days |  |
Maximum [Member] | Investment Agreement Contracts and MTNs [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Future guarantee payments, maturity range, (years) | 27 years 0 months 0 days |  |

X
- Definition Aggregate Amount Of Insurance In Force Outstanding Ceded To Reinsurers + References No definition available. + Details
Name: | mbi_AggregateAmountInsuranceInForceOutstandingCededToReinsurers
Namespace Prefix: | mbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate amount of insured par outstanding ceded to reinsurers. + References No definition available. + Details
Name: | mbi_AggregateAmountOfInsuredParOutstandingCededToReinsurers
Namespace Prefix: | mbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Future Guarantee Payments Maturity Range + References No definition available. + Details
Name: | mbi_FutureGuaranteePaymentsMaturityRange
Namespace Prefix: | mbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Insurance in force, expected maturity range + References No definition available. + Details
Name: | mbi_InsuranceInForceExpectedMaturityRangeYears
Namespace Prefix: | mbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reinsurance Recoverables Secured By Letters Of Credit Amount + References No definition available. + Details
Name: | mbi_ReinsuranceRecoverablesSecuredByLettersOfCreditAmount
Namespace Prefix: | mbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Transactions guaranteed on behalf of various affiliates + References No definition available. + Details
Name: | mbi_TransactionsGuaranteedOnBehalfOfVariousAffiliates
Namespace Prefix: | mbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition High end period remaining until maturity for the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeHigherRemainingMaturityRange1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13495-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226008-175313 + Details
Name: | us-gaap_DerivativeLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Low end period remaining until maturity of derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeLowerRemainingMaturityRange1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fee and commission revenue earned from sources not otherwise specified in the existing taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 9 + Details
Name: | us-gaap_FeesAndCommissionsOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_InsuranceRecoveries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_GuaranteeObligationsByNatureAxis=mbi_GuaranteesOfDerivativeContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |