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Loss and Loss Adjustment Expense Reserves (Tables) | 12 Months Ended
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Dec. 31, 2013
Text Block [Abstract] |
Schedule Of Losses And Loss Adjustment Expenses |
| Losses and LAE |  | Year Ended December 31, 2013 |
|  |  |  | Second-lien |  | First-lien |  |  |  |  |
| In millions |  | RMBS |  | RMBS |  | Other(1) |  | Total |
| Losses and LAE related to actual and expected payments |  | $ | 108 |  | $ | (60) |  | $ | 50 |  | $ | 98 |
| Recoveries of actual and expected payments |  |  | (110) |  |  | (10) |  |  | 140 |  |  | 20 |
| Gross losses incurred |  |  | (2) |  |  | (70) |  |  | 190 |  |  | 118 |
| Reinsurance |  |  | 0 |  |  | 0 |  |  | (1) |  |  | (1) |
| Losses and LAE |  | $ | (2) |  | $ | (70) |  | $ | 189 |  | $ | 117 |
| __________ |  |  |  |  |  |  |  |  |  |  |
| (1) - Includes ABS CDOs, CMBS, U.S. public finance and other issues.
Schedule Of Financial Guarantees And Related Claim Liability |
|  |  |  |  | Surveillance Categories
|  |  |  |  | Caution |  | Caution |  | Caution |  |  |  |  |  |
|  |  |  |  | List |  | List |  | List |  | Classified |  |  |
$ in millions |  | Low |  | Medium |  | High |  | List |  | Total
Number of policies |  |  | 83 |  |  | 19 |  |  | 5 |  |  | 192 |  |  | 299
Number of issues(1) |  |  | 26 |  |  | 14 |  |  | 4 |  |  | 136 |  |  | 180
Remaining weighted average contract |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| period (in years) |  |  | 11.0 |  |  | 4.9 |  |  | 11.5 |  |  | 9.5 |  |  | 9.7
Gross insured contractual payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| outstanding:(2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Principal |  | $ | 5,290 |  | $ | 1,073 |  | $ | 40 |  | $ | 7,861 |  | $ | 14,264
|  | Interest |  |  | 3,829 |  |  | 253 |  |  | 24 |  |  | 4,526 |  |  | 8,632
|  |  | Total |  | $ | 9,119 |  | $ | 1,326 |  | $ | 64 |  | $ | 12,387 |  | $ | 22,896
Gross claim liability |  | $ | 0 |  | $ | 0 |  | $ | 0 |  | $ | 1,235 |  | $ | 1,235
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Gross potential recoveries |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 1,085 |  |  | 1,085
| Discount, net |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 205 |  |  | 205
Net claim liability (recoverable) |  | $ | 0 |  | $ | 0 |  | $ | 0 |  | $ | (55) |  | $ | (55)
Unearned premium revenue |  | $ | 112 |  | $ | 19 |  | $ | 0 |  | $ | 96 |  | $ | 227
__________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) - An “issue” represents the aggregate of financial guarantee policies that share the same revenue source for purposes of making debt service payments.
(2) - Represents contractual principal and interest payments due by the issuer of the obligations insured by MBIA.
|  |  |  |  | Surveillance Categories
|  |  |  |  | Caution |  | Caution |  | Caution |  |  |  |  |  |
|  |  |  |  | List |  | List |  | List |  | Classified |  |  |
$ in millions |  | Low |  | Medium |  | High |  | List |  | Total
Number of policies |  |  | 54 |  |  | 25 |  |  | 10 |  |  | 206 |  |  | 295
Number of issues(1) |  |  | 29 |  |  | 15 |  |  | 10 |  |  | 136 |  |  | 190
Remaining weighted average contract |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| period (in years) |  |  | 8.1 |  |  | 4.0 |  |  | 7.6 |  |  | 9.5 |  |  | 8.7
Gross insured contractual payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| outstanding:(2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Principal |  | $ | 4,250 |  | $ | 1,176 |  | $ | 373 |  | $ | 9,458 |  | $ | 15,257
|  | Interest |  |  | 2,721 |  |  | 256 |  |  | 120 |  |  | 5,264 |  |  | 8,361
|  |  | Total |  | $ | 6,971 |  | $ | 1,432 |  | $ | 493 |  | $ | 14,722 |  | $ | 23,618
Gross claim liability |  | $ | 0 |  | $ | 0 |  | $ | 0 |  | $ | 1,589 |  | $ | 1,589
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Gross potential recoveries |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 4,109 |  |  | 4,109
| Discount, net |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 229 |  |  | 229
Net claim liability (recoverable) |  | $ | 0 |  | $ | 0 |  | $ | 0 |  | $ | (2,749) |  | $ | (2,749)
Unearned premium revenue |  | $ | 142 |  | $ | 11 |  | $ | 3 |  | $ | 122 |  | $ | 278
__________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) - An “issue” represents the aggregate of financial guarantee policies that share the same revenue source for purposes of making debt service payments.
(2) - Represents contractual principal and interest payments due by the issuer of the obligations insured by MBIA.
Present Value Of The Probability-Weighted Future Claim Payments And Recoveries |
|  |  |  | As of |  | As of |
| In millions |  | December 31, 2013 |  | December 31, 2012 |
| Loss reserves (claim liability) |  | $ | 580 |  | $ | 790 |
| LAE reserves |  |  | 61 |  |  | 63 |
|  | Loss and LAE reserves |  | $ | 641 |  | $ | 853 |
| Insurance claim loss recoverable |  | $ | (694) |  | $ | (3,610) |
| LAE insurance loss recoverable |  |  | 0 |  |  | (38) |
|  | Insurance loss recoverable |  | $ | (694) |  | $ | (3,648) |
| Reinsurance recoverable on unpaid losses |  | $ | 7 |  | $ | 14 |
| Reinsurance recoverable on unpaid LAE reserves |  |  | 1 |  |  | 0 |
| Reinsurance recoverable on paid losses |  |  | 0 |  |  | 1 |
|  | Reinsurance recoverable on paid and unpaid losses |  | $ | 8 |  | $ | 15 |
Schedule Of Company's Second-Lien RMBS Exposure, Gross Undiscounted Claim Liability And Potential Recoveries, Excluding Amounts Related To Consolidated VIE's |
Second-lien RMBS Exposure |  |  |  | Outstanding |  | Gross Undiscounted
|  |  |  |  | Gross |  | Gross |  | Claim |  | Potential
$ in billions |  | Issues |  | Principal |  | Interest |  | Liability |  | Recoveries
Excluding Consolidated VIEs: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-consolidated VIEs |  | 23 |  | $ | 3.4 |  | $ | 1.3 |  | $ | 0.2 |  | $ | 0.8
Consolidated VIEs: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated VIEs |  | 11 |  | $ | 1.7 |  | $ | 0.6 |  | $ | 0.1 |  | $ | 0.6
Schedule Of Loss And Loss Adjustment Expenses Reserves |
In millions |  | Changes in Loss and LAE Reserves for the Year Ended December 31, 2013 |  |  |
Gross Loss |  | Loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Gross Loss
and LAE |  | Payments |  | Accretion |  |  |  |  |  |  |  | Changes in |  |  |  |  |  |  |  | and LAE
Reserves as of |  | for Cases |  | of Claim |  | Changes in |  |  |  | Unearned |  | Changes in |  |  |  | Reserves as of
December 31, |  | with |  | Liability |  | Discount |  | Changes in |  | Premium |  | LAE |  |  |  | December 31,
2012 |  | Reserves |  | Discount |  | Rates |  | Assumptions |  | Revenue |  | Reserves |  | Other(1) |  | 2013
$ | 853 |  | $ | (337) |  | $ | 13 |  | $ | (92) |  | $ | 141 |  | $ | 12 |  | $ | (2) |  | $ | 53 |  | $ | 641
____________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) - Primarily changes in amount and timing of payments.
In millions |  | Changes in Loss and LAE Reserves for the Year Ended December 31, 2012 |  |  |
Gross Loss |  | Loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Gross Loss
and LAE |  | Payments |  | Accretion |  |  |  |  |  |  |  | Changes in |  |  |  |  |  |  | and LAE
Reserves as of |  | for Cases |  | of Claim |  | Changes in |  |  |  | Unearned |  | Changes in |  |  |  | Reserves as of
December 31, |  | with |  | Liability |  | Discount |  | Changes in |  | Premium |  | LAE |  |  |  | December 31,
2011 |  | Reserves |  | Discount |  | Rates |  | Assumptions |  | Revenue |  | Reserves |  | Other(1) |  | 2012
$ | 836 |  | $ | (395) |  | $ | 11 |  | $ | (26) |  | $ | 319 |  | $ | 2 |  | $ | 8 |  | $ | 98 |  | $ | 853
____________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) - Primarily changes in amount and timing of payments.
Schedule Of Insurance Loss Recoverable And Changes In Recoveries On Unpaid Losses |
|  |  |  |  |  | Changes in Insurance Loss Recoverable and Recoveries on Unpaid Losses |  |  |
|  |  |  |  |  | for the Year Ended December 31, 2013 |  |  |
|  |  | Gross |  |  |  |  |  |  |  |  |  |  |  |  | Gross
|  |  | Reserve |  | Collections |  |  |  |  |  |  |  |  |  |  | Reserve
|  |  | as of |  | for Cases |  | Accretion |  | Changes in |  |  |  |  | Changes in |  |  |  | as of
|  |  | December 31, |  | with |  | of |  | Discount |  | Changes in |  | LAE |  |  |  | December 31,
In millions |  | 2012 |  | Recoveries |  | Recoveries |  | Rates |  | Assumptions |  | Recoveries |  | Other(1) |  | 2013
Insurance loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| recoverable |  | $ | 3,648 |  | $ | (3,011) |  | $ | 19 |  | $ | (33) |  | $ | 126 |  | $ | (38) |  | $ | (17) |  | $ | 694
Recoveries on unpaid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| losses |  |  | 332 |  |  | 0 |  |  | 6 |  |  | (38) |  |  | (91) |  |  | (3) |  |  | 0 |  |  | 206
Total |  | $ | 3,980 |  | $ | (3,011) |  | $ | 25 |  | $ | (71) |  | $ | 35 |  | $ | (41) |  | $ | (17) |  | $ | 900
__________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) Primarily changes in amount and timing of collections. |  |  |
|  |  |  |  |  |  | Changes in Insurance Loss Recoverable and Recoveries on Unpaid Losses |  |  |
|  |  |  |  |  |  | for the Year Ended December 31, 2012 |  |  |
|  |  | Gross |  |  |  |  |  |  |  |  |  |  |  | Gross
|  |  | Reserve |  | Collections |  |  |  |  |  |  |  |  |  | Reserve
|  |  | as of |  | for Cases |  | Accretion |  | Changes in |  |  |  |  | Changes in |  |  |  | as of
|  |  | December 31, |  | with |  | of |  | Discount |  | Changes in |  | LAE |  |  |  | December 31,
In millions |  | 2011 |  | Recoveries |  | Recoveries |  | Rates |  | Assumptions |  | Recoveries |  | Other(1) |  | 2012
Insurance loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| recoverable |  | $ | 3,046 |  | $ | (13) |  | $ | 32 |  | $ | 4 |  | $ | 700 |  | $ | 24 |  | $ | (145) |  | $ | 3,648
Recoveries on unpaid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| losses |  |  | 562 |  |  | 0 |  |  | 7 |  |  | 12 |  |  | (238) |  |  | (11) |  |  | 0 |  |  | 332
Total |  | $ | 3,608 |  | $ | (13) |  | $ | 39 |  | $ | 16 |  | $ | 462 |  | $ | 13 |  | $ | (145) |  | $ | 3,980
__________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) Primarily changes in amount and timing of collections. |  |  |
Schedule Of Total Estimated Recoveries From Ineligible Second-Lien Mortgage Loans |
In millions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Estimated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Total Estimated
Recoveries from |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Recoveries from
Ineligible Mortgage |  | Accretion |  | Changes in |  |  |  |  |  |  |  |  |  | Ineligible Mortgage
Loans as of |  | of Future |  | Discount |  | Recoveries |  |  | Changes in |  |  |  | Loans as of
December 31, 2012 |  | Collections |  | Rates |  | (Collections) |  | Assumptions |  | Other(1) |  | December 31, 2013
$ | 3,583 |  | $ | 24 |  | $ | (9) |  | $ | (3,705) |  | $ | 443 |  | $ | 23 |  | $ | 359
__________ |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) Primarily changes in amount and timing of collections.
In millions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Estimated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Total Estimated
Recoveries from |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Recoveries from
Ineligible Mortgage |  | Accretion |  | Changes in |  |  |  |  |  |  |  |  |  | Ineligible Mortgage
Loans as of |  | of Future |  | Discount |  | Recoveries |  |  | Changes in |  |  |  | Loans as of
December 31, 2011 |  | Collections |  | Rates |  | (Collections) |  | Assumptions |  | Other |  | December 31, 2012
$ | 3,119 |  | $ | 36 |  | $ | 2 |  | $ | - |  | $ | 426 |  | $ | - |  | $ | 3,583
Schedule Of Expenses Related To Remedial Actions For Insured Obligations |
|  |  | Years Ended December 31, |
| In millions |  | 2013 |  | 2012 |  | 2011 |
| Loss adjustment expense incurred, gross |  | $ | 57 |  | $ | 137 |  | $ | 120 |

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- Definition Schedule Of Company's RMBS Exposure Gross Undiscounted Claim Liability And Potential Recoveries Before The Elimination Of Amounts Related To Consolidated VIE's [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of insured financial obligations with credit deterioration related to the claim liability on financial guarantee insurance contracts as of the end of each annual and interim reporting period detailing, at a minimum, the following for each surveillance category or grouping used to track and monitor the entity's insured financial obligations: (1) number of issued and outstanding financial guarantee insurance contracts; (2) remaining weighted average contract period; (3) insured contractual payments outstanding, segregating principal and interest; (4) gross claim liability; (5) gross potential recoveries; (6) net discount of both the claim liability and potential recoveries; (7) net claim liability; (8) reinsurance recoverable; and (9) unearned premium revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751140-161288 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5), (b)(1) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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