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Consolidated Statement Of Changes In Shareholders' Equity - USD ($) $ in Millions | Total | Total Shareholders' Equity Of MBIA Inc. [Member] | Common Stock [Member] | Additional Paid In Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Treasury Stock [Member] | Preferred Stock [Member] | Preferred Stock Of Subsidiary And Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2012 | $ 3,194 | $ 3,173 | $ 277 | $ 3,076 | $ 2,039 | $ 56 | $ (2,275) |  | $ 21
Balance (in common stock shares) at Dec. 31, 2012 |  |  | 277,405,039 |  |  |  | (81,733,530) |  |
Balance (in preferred stock shares) at Dec. 31, 2012 |  |  |  |  |  |  |  | 1,315 |
Net income (loss) | 250 | 250 |  |  | 250 |  |  |  |
Other comprehensive income (loss) | (142) | (142) |  |  |  | (142) |  |  |
Share-based compensation, net of tax of $4, $2 and $9 | 4 | 4 | $ 1 | 39 |  |  | $ (36) |  |
Share-based compensation (in shares) |  |  | 407,391 |  |  |  | (3,292,641) |  |
Treasury shares acquired | (7) | (7) |  |  |  |  | $ (7) |  |
Treasury shares acquired (in shares) |  |  |  |  |  |  | (536,375) |  |
Balance at Dec. 31, 2013 | 3,299 | 3,278 | $ 278 | 3,115 | 2,289 | (86) | $ (2,318) |  | 21
Balance (in common stock shares) at Dec. 31, 2013 |  |  | 277,812,430 |  |  |  | (85,562,546) |  |
Balance (in preferred stock shares) at Dec. 31, 2013 |  |  |  |  |  |  |  | 1,315 |
Net income (loss) | 569 | 569 |  |  | 569 |  |  |  |
Other comprehensive income (loss) | 107 | 107 |  |  |  | 107 |  |  |
Share-based compensation, net of tax of $4, $2 and $9 | 10 | 10 | $ 3 | 13 |  |  | $ (6) |  |
Share-based compensation (in shares) |  |  | 3,540,352 |  |  |  | (513,267) |  |
Treasury shares acquired | $ (35) | (35) |  |  |  |  | $ (35) |  |
Treasury shares acquired (in shares) | (3,300,000) |  |  |  |  |  | (3,334,074) |  |
Balance at Dec. 31, 2014 | $ 3,950 | 3,929 | $ 281 | 3,128 | 2,858 | 21 | $ (2,359) |  | 21
Balance (in common stock shares) at Dec. 31, 2014 | 281,352,782 |  | 281,352,782 |  |  |  | (89,409,887) |  |
Balance (in preferred stock shares) at Dec. 31, 2014 | 0 |  |  |  |  |  |  | 1,315 |
ASU 2015-02 transition adjustment | $ (9) |  |  |  |  |  |  |  | (9)
Net income (loss) | 180 | 180 |  |  | 180 |  |  |  |
Other comprehensive income (loss) | (82) | (82) |  |  |  | (82) |  |  |
Share-based compensation, net of tax of $4, $2 and $9 | 5 | 5 | $ 1 | 10 |  |  | $ (6) |  |
Share-based compensation (in shares) |  |  | 480,836 |  |  |  | (986,455) |  |
Treasury shares acquired | $ (303) | (303) |  |  |  |  | $ (303) |  |
Treasury shares acquired (in shares) | (39,900,000) |  |  |  |  |  | (39,906,899) |  |
Balance at Dec. 31, 2015 | $ 3,741 | $ 3,729 | $ 282 | $ 3,138 | $ 3,038 | $ (61) | $ (2,668) |  | $ 12
Balance (in common stock shares) at Dec. 31, 2015 | 281,833,618 |  | 281,833,618 |  |  |  | (130,303,241) |  |
Balance (in preferred stock shares) at Dec. 31, 2015 | 0 |  |  |  |  |  |  | 1,315 |

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