Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Investments:
Cash and cash equivalents	$ 151	$ 160
Total assets	4,443	4,696
Liabilities:
Total liabilities	4,995	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)	(531)	(458)
Accumulated other comprehensive income (loss), net of tax of $8 and $8	(82)	100
Treasury stock, at cost - 228,329,115 and 228,630,003 shares	(3,154)	(3,169)
Total shareholders' equity of MBIA Inc.	(565)	(313)
Preferred stock of subsidiary	13	13
Total equity	(552)	(300)
Total liabilities and equity	4,443	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 $2,710 and $2,016)	2,677	2,157
Investments carried at fair value	356	258
Investments pledged as collateral, at fair value (amortized cost $- and $4)	0	4
Short-term investments, at fair value (amortized cost $441 and $374)	441	374
Total investments	3,474	2,793
Cash and cash equivalents	147	151
Premiums receivable (net of allowance for credit losses $5 and $5)	177	178
Deferred acquisition costs	41	42
Insurance loss recoverable	366	1,296
Other assets	81	67
Liabilities:
Unearned premium revenue	308	322
Loss and loss adjustment expense reserves	886	894
Long-term debt	2,344	2,331
Medium-term notes (includes financial instruments carried at fair value of $99 and $98)	589	590
Investment agreements	274	274
Derivative liabilities	99	131
Other liabilities	210	163
Variable Interest Entity Primary Beneficiary [Member]
Investments:
Investments carried at fair value	53	60
Other assets	24	23
Cash	4	9
Loans receivable at fair value	76	77
Liabilities:
Variable interest entity notes carried at fair value	$ 285	$ 291