XML 146 R105.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Debt (Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified |  |  | 12 Months Ended | 0 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2011 6.400% Senior Notes Due 2022 [Member] | Dec. 31, 2011 7.000% Debentures Due 2025 [Member] | Dec. 31, 2011 7.150% Debentures Due 2027 [Member] | Dec. 31, 2011 6.625% Debentures Due 2028 [Member] | Dec. 31, 2011 5.700% Senior Notes Due 2034 [Member] | Jan. 16, 2008 14% Surplus Notes Due 2033 [Member] | Dec. 31, 2011 14% Surplus Notes Due 2033 [Member] | Dec. 31, 2011 Non Variable Interest Entities [Member] | Dec. 31, 2010 Non Variable Interest Entities [Member] | Dec. 31, 2011 Non Variable Interest Entities [Member] 6.400% Senior Notes Due 2022 [Member] | Dec. 31, 2010 Non Variable Interest Entities [Member] 6.400% Senior Notes Due 2022 [Member] | Dec. 31, 2011 Non Variable Interest Entities [Member] 7.000% Debentures Due 2025 [Member] | Dec. 31, 2010 Non Variable Interest Entities [Member] 7.000% Debentures Due 2025 [Member] | Dec. 31, 2011 Non Variable Interest Entities [Member] 7.150% Debentures Due 2027 [Member] | Dec. 31, 2010 Non Variable Interest Entities [Member] 7.150% Debentures Due 2027 [Member] | Dec. 31, 2011 Non Variable Interest Entities [Member] 6.625% Debentures Due 2028 [Member] | Dec. 31, 2010 Non Variable Interest Entities [Member] 6.625% Debentures Due 2028 [Member] | Dec. 31, 2011 Non Variable Interest Entities [Member] 5.700% Senior Notes Due 2034 [Member] | Dec. 31, 2010 Non Variable Interest Entities [Member] 5.700% Senior Notes Due 2034 [Member] | Dec. 31, 2011 Non Variable Interest Entities [Member] 14% Surplus Notes Due 2033 [Member] | Dec. 31, 2010 Non Variable Interest Entities [Member] 14% Surplus Notes Due 2033 [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross | $ 901 | $ 907 |  |  |  |  |  |  |  |  |  | $ 275 | [1] | $ 281 | [1] | $ 56 | $ 56 | $ 100 | $ 100 | $ 141 | $ 141 | $ 329 | [2] | $ 329 | [2] |  |  |  |
Less unamortized discount | 1 | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subtotal | 900 | 906 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
14% Surplus Notes due 2033 |  |  |  |  |  |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 940 | [3] | 945 | [3]
Total |  |  |  |  |  |  |  |  |  | $ 1,840 | $ 1,851 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  | 6.40% | 7.00% | 7.15% | 6.625% | 5.70% | 14.00% | 14.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, maturity, year |  |  | 2022 | 2025 | 2027 | 2028 | 2034 |  | 2033 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial Callable date |  |  | Aug. 15, 2006 |  |  |  |  |  | Jan. 15, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Callable, price |  |  |  |  |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Callable date for fifth anniversary of initial callable date |  |  |  |  |  |  |  |  | January 15, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Callable date for subsequent fifth anniversary of initial callable date |  |  |  |  |  |  |  |  | January 15, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Latest callable date before maturity |  |  |  |  |  |  |  |  | Jan. 15, 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, maturity date |  |  |  |  |  |  |  | Jan. 15, 2033 | Jan. 15, 2033 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Callable on or after August 15, 2006 at 100.00.
[2] | Callable anytime at the greater of 100.00 or the present value of the remaining scheduled payments of principal and interest.
[3] | Callable on January 15, 2013 and every fifth anniversary thereafter at 100.00.

X
- Definition Debt instrument, call date for first fifth anniversary. + References No definition available. + Details
Name: | mbi_DebtInstrumentCallDateForFirstFifthAnniversary
Namespace Prefix: | mbi_
Data Type: | invest:dateStringItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt instrument call date for second fifth anniversary. + References No definition available. + Details
Name: | mbi_DebtInstrumentCallDateForSecondFifthAnniversary
Namespace Prefix: | mbi_
Data Type: | invest:dateStringItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt instrument maturity year. + References No definition available. + Details
Name: | mbi_DebtInstrumentMaturityYear
Namespace Prefix: | mbi_
Data Type: | invest:dateStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term debt before surplus notes, noncurrent. + References No definition available. + Details
Name: | mbi_LongTermDebtBeforeSurplusNotesNoncurrent
Namespace Prefix: | mbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Notes callable price. + References No definition available. + Details
Name: | mbi_NotesCallablePrice
Namespace Prefix: | mbi_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition The earliest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity, which may be presented in a variety of ways (year only, month and year, day, month and year, quarter, etc.). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 + Details
Name: | us-gaap_DebtInstrumentCallDateEarliest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The latest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity, which may be presented in a variety of ways (year only, month and year, day, month and year, quarter, etc.). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 + Details
Name: | us-gaap_DebtInstrumentCallDateLatest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -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 Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Financial instruments issued by insurance entities (surplus notes) that are includable in surplus for statutory accounting purposes as prescribed or permitted by state laws and regulations that are liabilities of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486086&loc=d3e24387-158525 + Details
Name: | us-gaap_SurplusNotes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant