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Schedule II (Condensed Balance Sheets) (Detail) - USD ($) $ / shares in Units, $ in Millions | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Assets [Abstract] |  |  |  |
Cash and cash equivalents | $ 187 | $ 522 | $ 782 | $ 1,258
Total assets | 11,137 | 14,836 | 16,263 |
Liabilities: |  |  |  |
Long-term debt | 1,986 | 1,889 |  |
Derivative liabilities | 66 | 88 |  |
Total liabilities | 7,898 | 11,095 |  |
Equity: |  |  |  |
Preferred stock, par value $1 per share; authorized shares--10,000,000; issued and outstanding--none | 0 | 0 |  |
Common stock, par value $1 per share; authorized shares--400,000,000; issued shares-- 283,989,999 and 281,833,618 | 284 | 282 |  |
Additional paid-in capital | 3,160 | 3,138 |  |
Retained earnings | 2,700 | 3,038 |  |
Accumulated other comprehensive income (loss), net of tax | (128) | (61) | 21 | (86)
Treasury stock, at cost-- 148,789,168 and 130,303,241 shares | (2,789) | (2,668) |  |
Total shareholders' equity of MBIA Inc. | 3,227 | 3,729 |  |
Total liabilities and equity | 11,137 | 14,836 |  |
Fixed-maturity securities held as available-for-sale, amortized cost | $ 5,450 | $ 6,160 |  |
Preferred stock, par value | $ 1 | $ 1 |  |
Preferred stock, authorized shares | 10,000,000 | 10,000,000 |  |
Preferred stock, issued | 0 | 0 |  |
Preferred stock, outstanding | 0 | 0 |  |
Common stock, par value | $ 1 | $ 1 |  |
Common stock, authorized shares | 400,000,000 | 400,000,000 |  |
Common stock, issued shares | 283,989,999 | 281,833,618 |  |
Treasury stock, shares | 148,789,168 | 130,303,241 |  |
Parent Company [Member] |  |  |  |
Assets [Abstract] |  |  |  |
Fixed-maturity securities held as available-for-sale, at fair value (amortized cost $687 and $749) | $ 725 | $ 801 |  |
Investments carried at fair value | 6 | 7 |  |
Investments pledged as collateral, at fair value (amortized cost $242 and $329) | 233 | 291 |  |
Short-term investments held as available-for-sale, at fair value (amortized cost $278 and $245) | 278 | 245 |  |
Other investments | 2 | 4 |  |
Total investments | 1,244 | 1,348 |  |
Cash and cash equivalents | 13 | 35 | $ 100 | $ 140
Investment in wholly-owned subsidiaries | 3,673 | 4,085 |  |
Deferred income taxes, net | 1,003 | 991 |  |
Other assets | 107 | 103 |  |
Total assets | 6,040 | 6,562 |  |
Liabilities: |  |  |  |
Investment agreements | 361 | 423 |  |
Long-term debt | 576 | 575 |  |
Affiliate loans payable | 901 | 1,022 |  |
Income taxes payable | 696 | 573 |  |
Other liabilities | 279 | 240 |  |
Total liabilities | 2,813 | 2,833 |  |
Equity: |  |  |  |
Preferred stock, par value $1 per share; authorized shares--10,000,000; issued and outstanding--none | 0 | 0 |  |
Common stock, par value $1 per share; authorized shares--400,000,000; issued shares-- 283,989,999 and 281,833,618 | 284 | 282 |  |
Additional paid-in capital | 3,160 | 3,138 |  |
Retained earnings | 2,700 | 3,038 |  |
Accumulated other comprehensive income (loss), net of tax | (128) | (61) |  |
Treasury stock, at cost-- 148,789,168 and 130,303,241 shares | (2,789) | (2,668) |  |
Total shareholders' equity of MBIA Inc. | 3,227 | 3,729 |  |
Total liabilities and equity | 6,040 | 6,562 |  |
Fixed-maturity securities held as available-for-sale, amortized cost | 687 | 749 |  |
Investments pledged as collateral, amortized cost | 242 | 329 |  |
Short-term investments held as available-for-sale, amortized cost | $ 278 | $ 245 |  |
Preferred stock, par value | $ 1 | $ 1 |  |
Preferred stock, authorized shares | 10,000,000 | 10,000,000 |  |
Preferred stock, issued | 0 | 0 |  |
Preferred stock, outstanding | 0 | 0 |  |
Common stock, par value | $ 1 | $ 1 |  |
Common stock, authorized shares | 400,000,000 | 400,000,000 |  |
Common stock, issued shares | 283,989,999 | 281,833,618 |  |
Treasury stock, shares | 148,789,168 | 130,303,241 |  |

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