Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statements of Comprehensive Income (Loss)
Net income (loss) attributable to MBIA Inc.	$ (86)	$ (93)
Available-for-sale securities with no credit losses:
Unrealized gains (losses) arising during the period	(15)	43
Reclassification adjustments for (gains) losses included in net income (loss)	0	5
Foreign currency translation gains (losses)	0	(1)
Instrument-specific credit risk of liabilities measured at fair value:
Unrealized gains (losses) arising during the period	4	1
Reclassification adjustments for (gains) losses included in net income (loss)	19	14
Total other comprehensive income (loss)	8	62
Comprehensive income (loss) attributable to MBIA Inc.	$ (78)	$ (31)