Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Investments:
Total assets	$ 4,067	$ 4,696
Liabilities:
Total liabilities	4,802	4,996
Commitments and contingencies (Refer to Note 13: Commitments and Contingencies)
Equity:
Preferred stock, par value $1 per share; authorized shares--10,000,000; issued and outstanding—none	0	0
Common stock, par value $1 per share; authorized shares--400,000,000; issued shares--283,186,115 and 283,186,115	283	283
Additional paid-in capital	2,919	2,931
Retained earnings (deficit)	(567)	(458)
Accumulated other comprehensive income (loss), net of tax of $8 and $8	(231)	100
Treasury stock, at cost--228,286,399 and 228,630,003 shares	(3,152)	(3,169)
Total shareholders' equity of MBIA Inc.	(748)	(313)
Preferred stock of subsidiary	13	13
Total equity	(735)	(300)
Total liabilities and equity	4,067	4,696
Non Variable Interest Entity [Member]
Investments:
Fixed-maturity securities held as available-for-sale, at fair value (net of allowance for credit losses $3 and $-, amortized cost $2,350 and $2,016)	2,188	2,157
Investments carried at fair value	332	258
Investments pledged as collateral, at fair value (amortized cost $- and $4)	0	4
Short-term investments, at fair value (amortized cost $458 and $374)	458	374
Total investments	2,978	2,793
Cash and cash equivalents	202	151
Premiums receivable (net of allowance for credit losses $5 and $5)	171	178
Deferred acquisition costs	39	42
Insurance loss recoverable	443	1,296
Other assets	85	67
Liabilities:
Unearned premium revenue	297	322
Loss and loss adjustment expense reserves	965	894
Long-term debt	2,359	2,331
Medium-term notes (includes financial instruments carried at fair value of $42 and $98)	493	590
Investment agreements	277	274
Derivative liabilities	72	131
Other liabilities	122	163
Variable Interest Entity Primary Beneficiary [Member]
Investments:
Investments carried at fair value	51	60
Other assets	25	23
Cash	5	9
Loans receivable at fair value	68	77
Liabilities:
Variable interest entity notes carried at fair value	$ 217	$ 291