XML 75 R80.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Derivative Instruments (Total Fair Value Of Company's Derivative Assets And Liabilities By Instrument And Balance Sheet Location, Before Counterparty Netting) (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Derivative [Line Items] |  |  |  |
Derivative Instruments, Designated as hedging instruments | $ 149 |  | $ 241 |
Derivative Instruments, Not designated as hedging instruments | 77,324 |  | 87,616 |
Derivative assets, Total derivatives | 539 |  | 552 |
Derivative liabilities, Total derivatives | (5,700) |  | (6,100) |
Notional Amount Outstanding, Total derivatives | 77,473 |  | 87,857 |
Interest Rate Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Designated as hedging instruments | 149 |  | 241 |
Derivative Instruments, Not designated as hedging instruments | 2,649 |  | 2,706 |
Insured Credit Default Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 60,412 |  | 66,851 |
Insured Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 6,746 |  | 7,156 |
Non-Insured Credit Default Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 30 |  | 30 |
Non-Insured Credit Default Swaps-VIE [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 1,272 |  | 1,272 |
Interest Rate Swaps-VIE [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 4,791 |  | 4,878 |
Interest Rate Swaps-Embedded [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 489 |  | 480 |
Currency Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 40 |  | 62 |
Currency Swaps-VIE [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 119 |  | 123 |
All Other [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 195 |  | 3,465 |
All Other-VIE [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 460 |  | 472 |
All Other-Embedded [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments, Not designated as hedging instruments | 121 |  | 121 |
Derivative Assets [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Assets, Designated, Fair Value | 8 | [1] | 10 | [1]
Derivative Assets, Not designated, Fair Value | 531 | [1] | 542 | [1]
Derivative assets, Total derivatives | 539 | [1] | 552 | [1]
Derivative Assets [Member] | Interest Rate Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Assets, Designated, Fair Value | 8 | [1] | 10 | [1]
Derivative Assets, Not designated, Fair Value | 70 | [1] | 84 | [1]
Derivative Assets [Member] | Insured Credit Default Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Assets, Not designated, Fair Value | 10 | [1] |  |
Derivative Assets [Member] | Non-Insured Credit Default Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Assets, Not designated, Fair Value |  |  | 1 | [1]
Derivative Liabilities [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Designated, Fair Value | (15) | [1] | (44) | [1]
Derivative Liabilities, Not designated, Fair Value | (5,717) | [1] | (6,064) | [1]
Derivative liabilities, Total derivatives | (5,732) | [1] | (6,108) | [1]
Derivative Liabilities [Member] | Interest Rate Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Designated, Fair Value | (15) | [1] | (44) | [1]
Derivative Liabilities, Not designated, Fair Value | (375) | [1] | (401) | [1]
Derivative Liabilities [Member] | Insured Credit Default Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Not designated, Fair Value | (4,416) | [1] | (4,708) | [1]
Derivative Liabilities [Member] | Insured Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Not designated, Fair Value | (9) | [1] | (9) | [1]
Derivative Liabilities [Member] | Currency Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Not designated, Fair Value | (3) | [1] | (4) | [1]
Derivative Liabilities [Member] | All Other [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Not designated, Fair Value | (88) | [1] | (91) | [1]
Medium-Term Notes [Member] | Interest Rate Swaps-Embedded [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Assets, Not designated, Fair Value | 6 | [1] | 7 | [1]
Derivative Liabilities, Not designated, Fair Value | (22) | [1] | (14) | [1]
Derivative Assets-VIE [Member] | Non-Insured Credit Default Swaps-VIE [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Assets, Not designated, Fair Value | 443 | [1] | 447 | [1]
Derivative Assets-VIE [Member] | All Other-VIE [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Assets, Not designated, Fair Value | 2 | [1] | 3 | [1]
Derivative Liabilities-VIE [Member] | Non-Insured Credit Default Swaps-VIE [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Not designated, Fair Value | (525) | [1] | (527) | [1]
Derivative Liabilities-VIE [Member] | Interest Rate Swaps-VIE [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Not designated, Fair Value | (259) | [1] | (281) | [1]
Derivative Liabilities-VIE [Member] | Currency Swaps-VIE [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Not designated, Fair Value | (19) | [1] | (17) | [1]
Derivative Liabilities, Other Investments [Member] | All Other-Embedded [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liabilities, Not designated, Fair Value | $ (1) | [1] | $ (12) | [1]
[1] | In accordance with the accounting guidance for derivative instruments and hedging activities, the balance sheet location of the Company's embedded derivative instruments is determined by the location of the related host contract.

X
- Definition Fair value of derivative Asset Designated As Hedging Instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References No definition available. + Details
Name: | mbi_DerivativeAssetsDesignatedAsHedgingInstrumentFairValue
Namespace Prefix: | mbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of derivative Asset Not Designated As Hedging Instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References No definition available. + Details
Name: | mbi_DerivativeAssetsNotDesignatedAsHedgingInstrumentFairValue
Namespace Prefix: | mbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of derivative liability Designated As Hedging Instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References No definition available. + Details
Name: | mbi_DerivativeLiabilitiesDesignatedAsHedgingInstrumentFairValue
Namespace Prefix: | mbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of derivative liability Not Designated As Hedging Instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References No definition available. + Details
Name: | mbi_DerivativeLiabilitiesNotDesignatedAsHedgingInstrumentFairValue
Namespace Prefix: | mbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Aggregate notional amount of all derivatives. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 + Details
Name: | us-gaap_NotionalAmountOfDerivatives
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate notional amount of all derivatives designated as a fair value hedging instrument. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 + Details
Name: | us-gaap_NotionalAmountOfFairValueHedgeInstruments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate notional amount of all derivatives not designated as a hedging instrument. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 + Details
Name: | us-gaap_NotionalAmountOfOtherDerivativesNotDesignatedAsHedgingInstruments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant