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Variable Interest Entities (Summary Of Nonconsolidated VIEs Assets And Liabilities) (Detail) (USD $) In Millions, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Collateralized Debt Obligations [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets | $ 8,399 |  | $ 12,565 |
Maximum Exposure to Loss | 6,267 |  | 7,693 |
Investments | 117 | [1] | 120 | [1]
Premiums receivable | 30 | [2] | 43 | [2]
Insurance loss recoverable | 0 | [3] | 0 | [3]
Unearned premium revenue | 25 | [4] | 37 | [4]
Loss and loss adjustment expense reserves | 8 | [5] | 21 | [5]
Derivative liabilities | 96 | [6] | 108 | [6]
Residential Mortgage Backed Securities [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets | 15,622 |  | 21,738 |
Maximum Exposure to Loss | 8,274 |  | 9,251 |
Investments | 9 | [1] | 10 | [1]
Premiums receivable | 48 | [2] | 53 | [2]
Insurance loss recoverable | 587 | [3] | 658 | [3]
Unearned premium revenue | 46 | [4] | 51 | [4]
Loss and loss adjustment expense reserves | 322 | [5] | 327 | [5]
Derivative liabilities | 5 | [6] | 5 | [6]
Commercial Mortgage Backed Securities [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets | 617 |  | 1,367 |
Maximum Exposure to Loss | 322 |  | 447 |
Investments | 0 | [1] | 0 | [1]
Premiums receivable | 1 | [2] | 1 | [2]
Insurance loss recoverable | 0 | [3] | 0 | [3]
Unearned premium revenue | 1 | [4] | 1 | [4]
Loss and loss adjustment expense reserves | 0 | [5] | 0 | [5]
Derivative liabilities | 0 | [6] | 0 | [6]
Consumer Asset Backed [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets | 6,372 |  | 7,830 |
Maximum Exposure to Loss | 2,450 |  | 2,740 |
Investments | 0 | [1] | 9 | [1]
Premiums receivable | 18 | [2] | 19 | [2]
Insurance loss recoverable | 0 | [3] | 0 | [3]
Unearned premium revenue | 16 | [4] | 19 | [4]
Loss and loss adjustment expense reserves | 10 | [5] | 13 | [5]
Derivative liabilities | 0 | [6] | 0 | [6]
Corporate Asset Backed [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets | 10,414 |  | 13,028 |
Maximum Exposure to Loss | 6,414 |  | 7,248 |
Investments | 1 | [1] | 2 | [1]
Premiums receivable | 62 | [2] | 80 | [2]
Insurance loss recoverable | 18 | [3] | 18 | [3]
Unearned premium revenue | 75 | [4] | 96 | [4]
Loss and loss adjustment expense reserves | 0 | [5] | 0 | [5]
Derivative liabilities | 0 | [6] | 0 | [6]
Global Structured Finance [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets | 41,424 |  | 56,528 |
Maximum Exposure to Loss | 23,727 |  | 27,379 |
Investments | 127 | [1] | 141 | [1]
Premiums receivable | 159 | [2] | 196 | [2]
Insurance loss recoverable | 605 | [3] | 676 | [3]
Unearned premium revenue | 163 | [4] | 204 | [4]
Loss and loss adjustment expense reserves | 340 | [5] | 361 | [5]
Derivative liabilities | 101 | [6] | 113 | [6]
Global Public Finance [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets | 56,176 |  | 52,317 |
Maximum Exposure to Loss | 20,609 |  | 20,162 |
Investments | 0 | [1] | 0 | [1]
Premiums receivable | 203 | [2] | 206 | [2]
Insurance loss recoverable | 0 | [3] | 0 | [3]
Unearned premium revenue | 243 | [4] | 248 | [4]
Loss and loss adjustment expense reserves | 5 | [5] | 5 | [5]
Derivative liabilities | 0 | [6] | 0 | [6]
Total Insurance [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets | 97,600 | [7] | 108,845 |
Maximum Exposure to Loss | 44,336 | [7] | 47,541 |
Investments | 127 | [1],[7] | 141 | [1]
Premiums receivable | 362 | [2],[7] | 402 | [2]
Insurance loss recoverable | 605 | [3],[7] | 676 | [3]
Unearned premium revenue | 406 | [4],[7] | 452 | [4]
Loss and loss adjustment expense reserves | 345 | [5],[7] | 366 | [5]
Derivative liabilities | 101 | [6],[7] | 113 | [6]
Collateral Loan Obligations [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets | 179 |  |  |
Trading Securities | $ 4 |  |  |
[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.
[7] | In addition, the Company holds a $4 million variable interest in a non-insurance VIE that invested in loans that totaled $179 million.

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- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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