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Schedule IV - Reinsurance
12 Months Ended
Dec. 31, 2013
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract]  
Supplemental Schedule of Reinsurance Premiums for Insurance Companies
 SCHEDULE IV 
 MBIA INC. AND SUBSIDIARIES 
 REINSURANCE 
 Years Ended December 31, 2013, 2012 and 2011 
 (In millions) 
                 
 Column A Column B Column C Column D Column E Column F 
        Assumed    Percentage 
         From    of Amount 
 Insurance Direct Ceded to Other Net Assumed 
 Premium Written Amount Others Companies Amount to Net 
 2013 $(40) $2 $1 $(41) -2% 
 2012 $17 $2 $2 $17 12% 
 2011 $(5) $3 $(2) $(10) 20%