v3.26.1
Consolidated Statements Of Operations - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Revenues:    
Net realized investment gains (losses) $ (0) $ (5)
Net gains (losses) on financial instruments at fair value and foreign exchange 0 (15)
Total revenues 24 [1] 14 [2]
Expenses:    
Losses and loss adjustment (3) 8
Interest 47 50
Total expenses 65 76
Income (loss) from continuing operations before income taxes (41) (62)
Provision (benefit) for income taxes 0 0
Income (loss) from continuing operations (41) (62)
Income (loss) from discontinued operations, net of income taxes (1) 0
Net income (loss) (42) (62)
Less: Net income (loss) attributable to noncontrolling interests (2) 0
Net income (loss) attributable to MBIA Inc. $ (40) $ (62)
Net income (loss) per common share attributable to MBIA Inc. - basic and diluted    
Continuing operations - basic $ (0.79) $ (1.28)
Continuing operations - diluted (0.79) (1.28)
Discontinued operations - basic (0.01) 0
Discontinued operations - diluted (0.01) (0)
Net income (loss) per common share attributable to MBIA Inc. - basic (0.8) (1.28)
Net income (loss) per common share attributable to MBIA Inc. - diluted $ (0.8) $ (1.28)
Weighted average number of common shares outstanding:    
Basic [3] 49,796,216 48,354,307
Diluted [3] 49,796,216 48,354,307
Non Variable Interest Entity [Member]    
Revenues:    
Premiums earned (net of ceded premiums of $-, and $-) $ 6 $ 8
Net investment income 18 18
Net realized investment gains (losses) 0 (5)
Net gains (losses) on financial instruments at fair value and foreign exchange 0 (15)
Fees and reimbursements 1 1
Other net realized gains (losses) (1) 0
Expenses:    
Losses and loss adjustment (3) 8
Amortization of deferred acquisition costs 1 1
Operating 16 16
Interest 47 50
Variable Interest Entity, Primary Beneficiary [Member]    
Revenues:    
Other net realized gains (losses) 0 7
Expenses:    
Operating $ 4 $ 1
[1] Includes net investment income of $15 million, $6 million, $3 million, and ($6) million for the U.S. Public Finance, Corporate, International and Structured Finance, and Eliminations segments, respectively.
[2] Includes net investment income of $15 million, $7 million, $3 million, and ($7) million for the U.S. Public Finance, Corporate, International and Structured Finance, and Eliminations segments, respectively.
[3] Includes approximately 1 million of participating securities that met the service condition and were eligible to receive nonforfeitable dividends or dividend equivalents for the three months ended March 31, 2026 and 2025.