Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total Shareholders' Equity Of MBIA Inc. [Member]	Preferred Stock [Member]	Preferred Stock And Non Controlling Interest Held For Sale [Member]
Total equity balance at Dec. 31, 2019		$ 283	$ 2,999	$ 607	$ (2)	$ (3,061)	$ 826		$ 13
Balance (in common stock shares) at Dec. 31, 2019		283,433,401
Balance (in treasury stock shares) at Dec. 31, 2019						(204,000,108)
Cumulative effect of prospective application of new accounting principle | ASU 2016-13 [Member]				(42)
Net income (loss) attributable to MBIA Inc.	$ (578)			(578)
Other comprehensive income (loss)	117				117
Treasury shares acquired under share repurchase program	$ (198)					$ (198)
Treasury shares acquired under share repurchase program (in shares)	(26,400,000)					(26,430,768)
Share-based compensation (in shares)		(247,286)				921,909
Share-based compensation			(37)			$ 48
Period change							(690)		0
Total equity balance at Dec. 31, 2020	$ 149	$ 283	2,962	(13)	115	$ (3,211)	136		13
Balance (in common stock shares) at Dec. 31, 2020		283,186,115
Balance (in treasury stock shares) at Dec. 31, 2020						(229,508,967)
Balance (in preferred stock shares) at Dec. 31, 2020								1,315
Cumulative effect of prospective application of new accounting principle | ASU 2016-13 [Member]				0
Net income (loss) attributable to MBIA Inc.	(445)			(445)
Other comprehensive income (loss)	(15)				(15)
Treasury shares acquired under share repurchase program						$ 0
Treasury shares acquired under share repurchase program (in shares)						0
Share-based compensation (in shares)		0				878,964
Share-based compensation			(31)			$ 42
Period change							(449)		0
Total equity balance at Dec. 31, 2021	$ (300)	$ 283	2,931	(458)	100	$ (3,169)	(313)		13
Balance (in common stock shares) at Dec. 31, 2021	283,186,115	283,186,115
Balance (in treasury stock shares) at Dec. 31, 2021	(228,630,003)					(228,630,003)
Balance (in preferred stock shares) at Dec. 31, 2021	0							1,315
Cumulative effect of prospective application of new accounting principle | ASU 2016-13 [Member]				0
Net income (loss) attributable to MBIA Inc.	$ (195)			(195)
Other comprehensive income (loss)	(383)				(383)
Treasury shares acquired under share repurchase program						$ 0
Treasury shares acquired under share repurchase program (in shares)						0
Share-based compensation (in shares)		0				296,559
Share-based compensation			(6)			$ 15
Period change							(569)		(7)
Total equity balance at Dec. 31, 2022	$ (876)		$ 2,925	$ (653)	$ (283)	$ (3,154)	$ (882)		$ 6
Balance (in common stock shares) at Dec. 31, 2022	283,186,115	283,186,115
Balance (in treasury stock shares) at Dec. 31, 2022	(228,333,444)					(228,333,444)
Balance (in preferred stock shares) at Dec. 31, 2022	0							1,315