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Variable Interest Entities (Summary Of Maximum Exposure To Loss For Nonconsolidated VIEs) (Details) (USD $) In Millions | Jun. 30, 2011 | Dec. 31, 2010
--- | --- | ---
Collateralized Debt Obligations [Member] |  |  |  |
VIE Assets | $ 29,140 |  | $ 30,628 |
Maximum Exposure to Loss | 17,197 |  | 18,068 |
Investments | 137 | [1] | 126 | [2]
Premiums Receivable | 68 | [2] | 78 | [2]
Unearned Premium Revenue | 59 | [3] | 68 | [3]
Derivative Liabilities | 428 | [4] | 360 | [4]
Residential Mortgage-Backed Agency [Member] |  |  |  |
VIE Assets | 51,751 |  | 56,828 |
Maximum Exposure to Loss | 17,206 |  | 18,494 |
Investments | 77 | [1] | 71 | [2]
Premiums Receivable | 90 | [2] | 95 | [2]
Insurance Loss Recoverable | 2,361 | [5] | 2,270 | [5]
Unearned Premium Revenue | 88 | [3] | 93 | [3]
Loss and Loss Adjustment Expense Reserves | 354 | [6] | 598 | [6]
Derivative Liabilities | 6 | [4] | 3 | [4]
Commercial Mortgage-Backed [Member] |  |  |  |
VIE Assets | 5,684 |  | 5,547 |
Maximum Exposure to Loss | 3,160 |  | 3,138 |
Premiums Receivable | 2 | [2] | 2 | [2]
Unearned Premium Revenue | 2 | [3] | 2 | [3]
Consumer Asset-Backed [Member] |  |  |  |
VIE Assets | 9,123 |  | 11,709 |
Maximum Exposure to Loss | 5,393 |  | 6,780 |
Investments | 18 | [1] | 19 | [2]
Premiums Receivable | 27 | [2] | 30 | [2]
Unearned Premium Revenue | 27 | [3] | 29 | [3]
Loss and Loss Adjustment Expense Reserves | 18 | [6] |  |
Corporate Asset-Backed [Member] |  |  |  |
VIE Assets | 30,011 |  | 42,380 |
Maximum Exposure to Loss | 17,060 |  | 22,468 |
Investments | 269 | [1] | 246 | [2]
Premiums Receivable | 205 | [2] | 325 | [2]
Insurance Loss Recoverable | 12 | [5] | 5 | [5]
Unearned Premium Revenue | 219 | [3] | 340 | [3]
Global Structured Finance [Member] |  |  |  |
VIE Assets | 125,709 |  | 147,092 |
Maximum Exposure to Loss | 60,016 |  | 68,948 |
Investments | 501 | [1] | 462 | [2]
Premiums Receivable | 392 | [2] | 530 | [2]
Insurance Loss Recoverable | 2,373 | [5] | 2,275 | [5]
Unearned Premium Revenue | 395 | [3] | 532 | [3]
Loss and Loss Adjustment Expense Reserves | 372 | [6] | 598 | [6]
Derivative Liabilities | 434 | [4] | 363 | [4]
Global Public Finance [Member] |  |  |  |
VIE Assets | 43,781 |  | 42,370 |
Maximum Exposure to Loss | 23,485 |  | 21,201 |
Premiums Receivable | 222 | [2] | 225 | [2]
Unearned Premium Revenue | 277 | [3] | 280 | [3]
Total Insurance [Member] |  |  |  |
VIE Assets | 169,490 |  | 189,462 |
Maximum Exposure to Loss | 83,501 |  | 90,149 |
Investments | 501 | [1] | 462 | [2]
Premiums Receivable | 614 | [2] | 755 | [2]
Insurance Loss Recoverable | 2,373 | [5] | 2,275 | [5]
Unearned Premium Revenue | 672 | [3] | 812 | [3]
Loss and Loss Adjustment Expense Reserves | 372 | [6] | 598 | [6]
Derivative Liabilities | $ 434 | [4] | $ 363 | [4]
[1] | Reported within "Investments" on MBIA's consolidated balance sheets.
[2] |
[3] | Reported within "Unearned premium revenue" on MBIA's consolidated balance sheets.
[4] | Reported within "Derivative liabilities" on MBIA's consolidated balance sheets.
[5] | Reported within "Insurance loss recoverable" on MBIA's consolidated balance sheets.
[6] | Reported within "Loss and loss adjustment expense reserves" on MBIA's consolidated balance sheets.

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