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Variable Interest Entities (Summary Of Nonconsolidated VIEs Assets And Liabilities) (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Variable Interest Entity [Line Items] |  |  |  |
Premiums receivable |  | $ 792 | $ 875 | $ 1,051
Insurance loss recoverable |  | 577 | 533 | $ 694
Derivative liabilities |  | 88 | 246 |
Global Structured Finance [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets |  | 28,311 | 35,940 |
Maximum Exposure to Loss |  | 14,495 | 19,958 |
Investments | [1] | 74 | 119 |
Premiums receivable | [2] | 80 | 123 |
Insurance loss recoverable | [3] | 418 | 524 |
Unearned premium revenue | [4] | 78 | 121 |
Loss and loss adjustment expense reserves | [5] | 418 | 389 |
Derivative liabilities | [6] | 6 | 102 |
Global Structured Finance [Member] | Collateralized Debt Obligations [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets |  | 5,712 | 8,613 |
Maximum Exposure to Loss |  | 3,046 | 5,623 |
Investments | [1] | 51 | 110 |
Premiums receivable | [2] | 9 | 24 |
Unearned premium revenue | [4] | 6 | 20 |
Loss and loss adjustment expense reserves | [5] | 108 | 70 |
Derivative liabilities | [6] | 6 | 102 |
Global Structured Finance [Member] | Residential Mortgage Backed Securities [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets |  | 11,524 | 14,136 |
Maximum Exposure to Loss |  | 6,072 | 7,459 |
Investments | [1] | 23 | 9 |
Premiums receivable | [2] | 31 | 41 |
Insurance loss recoverable | [3] | 416 | 518 |
Unearned premium revenue | [4] | 30 | 39 |
Loss and loss adjustment expense reserves | [5] | 306 | 307 |
Global Structured Finance [Member] | Commercial Mortgage Backed Securities [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets |  | 319 | 571 |
Maximum Exposure to Loss |  | 219 | 279 |
Premiums receivable | [2] | 1 | 1 |
Unearned premium revenue | [4] | 1 | 1 |
Global Structured Finance [Member] | Consumer Asset Backed [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets |  | 5,538 | 6,008 |
Maximum Exposure to Loss |  | 1,712 | 1,989 |
Premiums receivable | [2] | 13 | 16 |
Unearned premium revenue | [4] | 11 | 14 |
Loss and loss adjustment expense reserves | [5] | 4 | 12 |
Global Structured Finance [Member] | Corporate Asset Backed [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets |  | 5,218 | 6,612 |
Maximum Exposure to Loss |  | 3,446 | 4,608 |
Premiums receivable | [2] | 26 | 41 |
Insurance loss recoverable | [3] | 2 | 6 |
Unearned premium revenue | [4] | 30 | 47 |
Global Public Finance [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets |  | 44,162 | 49,686 |
Maximum Exposure to Loss |  | 14,579 | 16,698 |
Premiums receivable | [2] | 160 | 179 |
Unearned premium revenue | [4] | 186 | 211 |
Total Insurance [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE Assets |  | 72,473 | 85,626 |
Maximum Exposure to Loss |  | 29,074 | 36,656 |
Investments | [1] | 74 | 119 |
Premiums receivable | [2] | 240 | 302 |
Insurance loss recoverable | [3] | 418 | 524 |
Unearned premium revenue | [4] | 264 | 332 |
Loss and loss adjustment expense reserves | [5] | 418 | 389 |
Derivative liabilities | [6] | $ 6 | $ 102 |
[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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