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Schedule II - (Notes to Condensed Financial Statements) (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Dividends from subsidiaries | $ 118 | $ 114 |  |
Fair value of securities pledged as collateral | 416 | 457 |  |
Securities posted as collateral to derivative counterparties | 276 | 259 |  |
Cash and money market securities pledged as collateral under investment agreements | 187 | 522 | $ 782 | $ 1,258
National Public Finance Guarantee Holdings, Inc. [Member] |  |  |  |
Dividends from subsidiaries | 118 | 114 | 220 |
Trifinium Holdings Limited [Member] |  |  |  |
Dividends from subsidiaries |  | 1 | $ 5 |
MBIA Services Corporation [Member] |  |  |  |
Dividends from subsidiaries |  | 1 |  |
MBIA Inc. [Member] |  |  |  |
Liquid assets | 403 |  |  |
Fair value of securities pledged as collateral | 394 | 402 |  |
Securities posted as collateral to derivative counterparties | 276 | 259 |  |
Fair Value Of The Collateral Pledged By MBIA Inc [Member] | MBIA Inc. [Member] |  |  |  |
Money market securities pledged as collateral under investment agreements | $ 6 | $ 12 |  |

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