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Variable Interest Entities (Tables) | 3 Months Ended
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Mar. 31, 2017
Text Block [Abstract] |
Summary Of Nonconsolidated VIEs Assets And Liabilities |
|  |  |  | March 31, 2017
|  |  |  |  |  |  |  |  |  | Carrying Value of Assets |  | Carrying Value of Liabilities
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Loss and Loss
|  |  |  |  |  |  | Maximum |  |  |  |  |  |  |  |  |  | Unearned |  | Adjustment
|  |  |  | VIE |  | Exposure |  |  |  |  | Premiums |  | Insurance Loss |  | Premium |  | Expense
In millions | Assets |  | to Loss |  | Investments(1) |  | Receivable(2) |  | Recoverable(3) |  | Revenue(4) |  | Reserves(5)
Insurance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Global structured finance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Collateralized debt obligations | $ | 1,955 |  | $ | 995 |  | $ | 13 |  | $ | 1 |  | $ | - |  | $ | - |  | $ | -
|  | Mortgage-backed residential |  | 8,575 |  |  | 4,499 |  |  | 20 |  |  | 27 |  |  | 282 |  |  | 25 |  |  | 396
|  | Mortgage-backed commercial |  | 247 |  |  | 132 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | -
|  | Consumer asset-backed |  | 5,059 |  |  | 1,267 |  |  | - |  |  | 6 |  |  | 2 |  |  | 5 |  |  | 10
|  | Corporate asset-backed |  | 2,406 |  |  | 2,015 |  |  | - |  |  | 16 |  |  | - |  |  | 18 |  |  | -
| Total global structured finance |  | 18,242 |  |  | 8,908 |  |  | 33 |  |  | 50 |  |  | 284 |  |  | 48 |  |  | 406
| Global public finance |  | 19,035 |  |  | 3,062 |  |  | - |  |  | 11 |  |  | - |  |  | 18 |  |  | -
Total insurance | $ | 37,277 |  | $ | 11,970 |  | $ | 33 |  | $ | 61 |  | $ | 284 |  | $ | 66 |  | $ | 406
__________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(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.
|  |  |  |  | December 31, 2016
|  |  |  |  |  |  |  |  |  |  | Carrying Value of Assets |  | Carrying Value of Liabilities
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Loss and Loss
|  |  |  |  |  |  |  | Maximum |  |  |  |  |  |  |  |  |  | Unearned |  | Adjustment
|  |  |  |  | VIE |  | Exposure |  |  |  |  | Premiums |  | Insurance Loss |  | Premium |  | Expense
In millions |  | Assets |  | to Loss |  | Investments(1) |  | Receivable(2) |  | Recoverable(3) |  | Revenue(4) |  | Reserves(5)
Insurance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Global structured finance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Collateralized debt obligations |  | $ | 3,167 |  | $ | 1,914 |  | $ | 51 |  | $ | 2 |  | $ | - |  | $ | - |  | $ | 73
|  | Mortgage-backed residential |  |  | 9,146 |  |  | 4,796 |  |  | 20 |  |  | 28 |  |  | 304 |  |  | 27 |  |  | 325
|  | Mortgage-backed commercial |  |  | 257 |  |  | 145 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | -
|  | Consumer asset-backed |  |  | 4,893 |  |  | 1,331 |  |  | - |  |  | 7 |  |  | 2 |  |  | 5 |  |  | 8
|  | Corporate asset-backed |  |  | 2,625 |  |  | 2,205 |  |  | 5 |  |  | 18 |  |  | - |  |  | 20 |  |  | -
| Total global structured finance |  |  | 20,088 |  |  | 10,391 |  |  | 76 |  |  | 55 |  |  | 306 |  |  | 52 |  |  | 406
| Global public finance |  |  | 44,306 |  |  | 12,051 |  |  | - |  |  | 11 |  |  | - |  |  | 18 |  |  | -
Total insurance |  | $ | 64,394 |  | $ | 22,442 |  | $ | 76 |  | $ | 66 |  | $ | 306 |  | $ | 70 |  | $ | 406
__________ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(1) - Reported within "Investments" on MBIA's consolidated balance sheets.
(2) - Reported within "Premiums receivable" on MBIA's consolidated balance sheets. Excludes $125 million that is included within “Assets held for sale” on the Company’s consolidated balance sheet.
(3) - Reported within "Insurance loss recoverable" on MBIA's consolidated balance sheets.
(4) - Reported within "Unearned premium revenue" on MBIA's consolidated balance sheets. Excludes $134 million that is included within “Liabilities held for sale” on the Company’s consolidated balance sheet.
(5) - Reported within "Loss and loss adjustment expense reserves" 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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