Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 141	$ 146
Insurance loss recoverable	530	511
Loan repurchase commitments	407	407
Total assets	8,893	9,095
Liabilities:
Loss and loss adjustment expense reserves	1,006	979
Total liabilities	7,633	7,670
Commitments and contingencies (Refer to Note 20)
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-- 283,569,254 and 283,717,973	284	284
Additional paid-in capital	3,174	3,171
Retained earnings	1,164	1,095
Accumulated other comprehensive income (loss), net of tax of $7 and $16	(241)	(19)
Treasury stock, at cost-- 194,243,689 and 192,233,526 shares	(3,133)	(3,118)
Total shareholders' equity of MBIA Inc.	1,248	1,413
Preferred stock of subsidiary	12	12
Total equity	1,260	1,425
Total liabilities and equity	8,893	9,095
Non Variable Interest Entity [Member]
Assets
Fixed-maturity securities held as available-for-sale, at fair value (amortized cost $3,812 and $3,728)	3,757	3,712
Investments carried at fair value	228	200
Investments pledged as collateral, at fair value (amortized cost $34 and $147)	32	148
Short-term investments held as available-for-sale, at fair value (amortized cost $448 and $589)	448	589
Other investments (includes investments at fair value of $0 and $4)	1	6
Total investments	4,466	4,655
Cash and cash equivalents	120	122
Premiums receivable	368	369
Deferred acquisition costs	92	95
Insurance loss recoverable	530	511
Assets held for sale	0	0
Deferred income taxes, net	0	0
Other assets	134	128
Liabilities:
Unearned premium revenue	712	752
Loss and loss adjustment expense reserves	1,006	979
Long-term debt	2,154	2,121
Medium-term notes (includes financial instruments carried at fair value of $146 and $115)	790	765
Investment agreements	330	337
Derivative liabilities	219	262
Liabilities held for sale	0	0
Other liabilities	162	165
Variable Interest Entity Primary Beneficiary [Member]
Assets
Investments carried at fair value	176	182
Other assets	27	33
Cash	21	24
Investments held-to-maturity, at amortized cost (fair value $901 and $916)	890	890
Loans receivable at fair value	1,662	1,679
Loan repurchase commitments	407	407
Liabilities:
Variable interest entity notes (includes financial instruments carried at fair value of $1,031 and $1,069)	$ 2,260	$ 2,289