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Variable Interest Entities (Tables) | 6 Months Ended
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Jun. 30, 2013
Text Block [Abstract] |
Summary Of Nonconsolidated VIEs Assets And Liabilities |
|  |  |  |  | June 30, 2013
|  |  |  |  |  |  |  |  |  |  | Carrying Value of Assets |  | Carrying Value of Liabilities
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Loss and Loss |  |  |
|  |  |  |  |  |  |  | Maximum |  |  |  |  |  |  | Unearned |  | Adjustment |  |  |
|  |  |  |  | VIE |  | Exposure |  | Premiums |  | Insurance Loss |  | Premium |  | Expense |  | Derivative
In millions |  | Assets |  | to Loss |  | Receivable(1) |  | Recoverable(2) |  | Revenue(3) |  | Reserves(4) |  | Liabilities(5)
Insurance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Global structured finance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Collateralized debt obligations |  | $ | 12,688 |  | $ | 8,769 |  | $ | 57 |  | $ | 5 |  | $ | 50 |  | $ | 16 |  | $ | 95
|  | Mortgage-backed residential |  |  | 23,812 |  |  | 10,294 |  |  | 59 |  |  | 700 |  |  | 57 |  |  | 351 |  |  | 6
|  | Mortgage-backed commercial |  |  | 4,628 |  |  | 2,284 |  |  | 1 |  |  | 0 |  |  | 1 |  |  | 0 |  |  | 0
|  | Consumer asset-backed |  |  | 5,404 |  |  | 2,878 |  |  | 17 |  |  | 0 |  |  | 17 |  |  | 19 |  |  | 0
|  | Corporate asset-backed |  |  | 15,717 |  |  | 8,914 |  |  | 102 |  |  | 19 |  |  | 119 |  |  | 0 |  |  | 0
| Total global structured finance |  |  | 62,249 |  |  | 33,139 |  |  | 236 |  |  | 724 |  |  | 244 |  |  | 386 |  |  | 101
| Global public finance |  |  | 44,456 |  |  | 19,353 |  |  | 197 |  |  | 0 |  |  | 242 |  |  | 5 |  |  | 0
Total insurance |  | $ | 106,705 |  | $ | 52,492 |  | $ | 433 |  | $ | 724 |  | $ | 486 |  | $ | 391 |  | $ | 101
__________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) - Reported within "Premiums receivable" on MBIA's consolidated balance sheets.
(2) - Reported within "Insurance loss recoverable" on MBIA's consolidated balance sheets.
(3) - Reported within "Unearned premium revenue" on MBIA's consolidated balance sheets.
(4) - Reported within "Loss and loss adjustment expense reserves" on MBIA's consolidated balance sheets.
(5) - Reported within "Derivative liabilities" on MBIA's consolidated balance sheets.
|  |  |  |  | December 31, 2012
|  |  |  |  |  |  |  |  |  |  | Carrying Value of Assets |  | Carrying Value of Liabilities
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Loss and Loss |  |  |
|  |  |  |  |  |  |  | Maximum |  |  |  |  |  |  |  |  |  | Unearned |  | Adjustment |  |  |
|  |  |  |  | VIE |  | Exposure |  |  |  |  | Premiums |  | Insurance Loss |  | Premium |  | Expense |  | Derivative
In millions |  | Assets |  | to Loss |  | Investments(1) |  | Receivable(2) |  | Recoverable(3) |  | Revenue(4) |  | Reserves(5) |  | Liabilities(6)
Insurance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Global structured finance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Collateralized debt obligations |  | $ | 16,925 |  | $ | 10,873 |  | $ | 0 |  | $ | 62 |  | $ | 5 |  | $ | 55 |  | $ | 37 |  | $ | 74
|  | Mortgage-backed residential |  |  | 34,061 |  |  | 13,075 |  |  | 11 |  |  | 77 |  |  | 3,278 |  |  | 75 |  |  | 440 |  |  | 4
|  | Mortgage-backed commercial |  |  | 4,801 |  |  | 2,432 |  |  | - |  |  | 2 |  |  | - |  |  | 2 |  |  | - |  |  | -
|  | Consumer asset-backed |  |  | 5,820 |  |  | 3,086 |  |  | 10 |  |  | 19 |  |  | - |  |  | 19 |  |  | 21 |  |  | -
|  | Corporate asset-backed |  |  | 19,980 |  |  | 9,981 |  |  | 0 |  |  | 123 |  |  | 13 |  |  | 140 |  |  | - |  |  | 0
| Total global structured finance |  |  | 81,587 |  |  | 39,447 |  |  | 21 |  |  | 283 |  |  | 3,296 |  |  | 291 |  |  | 498 |  |  | 78
| Global public finance |  |  | 39,259 |  |  | 21,346 |  |  | - |  |  | 220 |  |  | - |  |  | 267 |  |  | 4 |  |  | -
Total insurance |  | $ | 120,846 |  | $ | 60,793 |  | $ | 21 |  | $ | 503 |  | $ | 3,296 |  | $ | 558 |  | $ | 502 |  | $ | 78
__________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) - Reported within "Investments" on MBIA's consolidated balance sheets.
(2) - Reported within "Premiums receivable" on MBIA's consolidated balance sheets.
(3) - Reported within "Insurance loss recoverable" on MBIA's consolidated balance sheets.
(4) - Reported within "Unearned premium revenue" on MBIA's consolidated balance sheets.
(5) - Reported within "Loss and loss adjustment expense reserves" on MBIA's consolidated balance sheets.
(6) - Reported within "Derivative liabilities" on MBIA's consolidated balance sheets.

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- Definition Schedule Of Summary Of Nonconsolidated VIEs Assets And Liabilities [Text Block] + References No definition available. + Details
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