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Consolidated Statement Of Changes In Shareholders' Equity - 3 months ended Mar. 31, 2016 - USD ($)
$ in Millions
Total
Preferred Stock Of Subsidiary [Member]
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]
Total equity balance at Dec. 31, 2015 $ 3,741 $ 12            
MBIA Inc. equity balance at Dec. 31, 2015 $ 3,729   $ 3,729 $ 282 $ 3,138 $ 3,038 $ (61) $ (2,668)
Balance (in common stock shares) at Dec. 31, 2015 281,833,618     281,833,618        
Balance (in treasury stock shares) at Dec. 31, 2015 (130,303,241)             (130,303,241)
Balance (in preferred stock shares) at Dec. 31, 2015 0 1,315            
Net income (loss) $ (78)   (78)     (78)    
Other comprehensive income (loss) 66   66       66  
Share-based compensation 4   4 $ 1 9     $ (6)
Share-based compensation (in shares)       1,556,549       (923,287)
Treasury shares acquired (94)   (94)         $ (94)
Treasury shares acquired (in shares)               (14,886,335)
MBIA Inc. equity balance at Mar. 31, 2016 3,627   $ 3,627 $ 283 $ 3,147 $ 2,960 $ 5 $ (2,768)
Total equity balance at Mar. 31, 2016 $ 3,639 $ 12            
Balance (in common stock shares) at Mar. 31, 2016 283,390,167     283,390,167        
Balance (in treasury stock shares) at Mar. 31, 2016 (146,112,863)             (146,112,863)
Balance (in preferred stock shares) at Mar. 31, 2016 0 1,315