Consolidated Statements Of Operations - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Net realized investment gains (losses)		$ (76)	$ (41)	$ 5
Net gains (losses) on financial instruments at fair value and foreign exchange		4	45	40
Net gains (losses) on extinguishment of debt		1	4	30
Fees and reimbursements		0	5	7
Total revenues		7	154	189
Expenses:
Losses and loss adjustment		177	38	350
Interest		210	179	163
Total expenses		491	302	634
Income (loss) from continuing operations before income taxes		(484)	(148)	(445)
Provision (benefit) for income taxes		0	1	0
Income (loss) from continuing operations		(484)	(149)	(445)
Income (loss) from discontinued operations, net of income taxes		(3)	(54)	0
Net income (loss)		(487)	(203)	(445)
Less: Net income from discontinued operations attributable to noncontrolling interest		4	(8)	0
Net income (loss) attributable to MBIA Inc.		$ (491)	$ (195)	$ (445)
Net income (loss) per common share attributable to MBIA Inc. - basic and diluted
Continuing operations - basic		$ (10.03)	$ (3)	$ (8.99)
Continuing operations - diluted		(10.03)	(3)	(8.99)
Discontinued operations - basic		(0.15)	(0.92)	0
Discontinued operations - diluted		(0.15)	(0.92)	0
Net income (loss) per common share attributable to MBIA Inc. - basic		(10.18)	(3.92)	(8.99)
Net income (loss) per common share attributable to MBIA Inc. - diluted		$ (10.18)	$ (3.92)	$ (8.99)
Weighted average number of common shares outstanding:
Basic	[1]	48,207,574	49,803,739	49,472,281
Diluted	[1]	48,207,574	49,803,739	49,472,281
Non Variable Interest Entity [Member]
Revenues:
Scheduled premiums earned		$ 35	$ 39	$ 64
Refunding premiums earned		2	14	10
Premiums earned (net of ceded premiums of $1, $1, and $16)		37	53	74
Net investment income		116	95	62
Net realized investment gains (losses)		(76)	(41)	5
Net gains (losses) on financial instruments at fair value and foreign exchange		4	45	40
Other net realized gains (losses)		(5)	(12)	(6)
Expenses:
Losses and loss adjustment		177	38	350
Amortization of deferred acquisition costs		5	8	6
Operating		87	68	91
Interest		210	179	163
Variable Interest Entity, Primary Beneficiary [Member]
Revenues:
Net gains (losses) on financial instruments at fair value and foreign exchange		(45)	(14)	(8)
Other net realized gains (losses)		(25)	19	(15)
Expenses:
Operating		11	8	6
Interest		$ 1	$ 1	$ 18

[1] Includes 0.6 million, 0.8 million and 0.9 million of participating securities that met the service condition and were eligible to receive nonforfeitable dividends or dividend equivalents for each of the years ended December 31, 2023, 2022 and 2021 respectively.