Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statements of Comprehensive Income (Loss)
Net income (loss) attributable to MBIA Inc.	$ (93)	$ (73)
Available-for-sale securities with no credit losses:
Unrealized gains (losses) arising during the period	43	(171)
Reclassification adjustments for (gains) losses included in net income (loss)	5	0
Foreign currency translation:
Foreign currency translation gains (losses)	(1)	0
Instrument-specific credit risk of liabilities measured at fair value:
Unrealized gains (losses) arising during the period	1	(14)
Reclassification adjustments for (gains) losses included in net income (loss)	14	3
Total other comprehensive income (loss)	62	(182)
Comprehensive income (loss) attributable to MBIA Inc.	$ (31)	$ (255)