XML 63 R52.htm IDEA: XBRL DOCUMENT v3.7.0.1
Fair Value Of Financial Instruments (Gains And Losses On Fair Value Option Included In The Company's Consolidated Statements Of Operations) (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange $ 17 $ (69)
Non Variable Interest Entity [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange 17 (69)
Variable Interest Entity [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange (33) (1)
Variable Interest Entity [Member] | Loan Repurchase Commitments [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange [1] 6 2
Investments Carried At Fair Value [Member] | Non Variable Interest Entity [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange [2] 3 3
Fixed Maturity Securities Held At Fair Value - VIE [Member] | Variable Interest Entity [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange [1] (8) (85)
Residential Mortgage Loans [Member] | Variable Interest Entity [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange [1] (72) (70)
Other Loans [Member] | Variable Interest Entity [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange [1] 3 0
Medium Term Notes [Member] | Non Variable Interest Entity [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange [2] (3) [1] (5)
Variable Interest Entity Notes [Member] | Variable Interest Entity [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net gains (losses) on financial instruments at fair value and foreign exchange [1] $ (45) $ 166
[1]
Reported within "Net gains (losses) of financial instruments at fair value and foreign exchange-VIE" on MBIA's consolidated statements of operations.
[2]
Reported within "Net gains (losses) of financial instruments at fair value and foreign exchange" on MBIA's consolidated statements of operations.