Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Investment portfolio:
Fixed maturity securities, available-for-sale, at fair value (amortized cost of $9,589 and $9,638)	$ 10,318		$ 10,142
Short term investments, at fair value	564		734
Other invested assets	205		223
Total investment portfolio	11,087		11,099
Cash	133		215
Premiums receivable, net of ceding commissions payable	944	[1]	1,003
Ceded unearned premium reserve	550		709
Deferred acquisition costs	127		132
Reinsurance recoverable on unpaid losses	56		69
Salvage and subrogation recoverable	430		368
Credit derivative assets	450		469
Deferred tax asset, net	729		804
Current income tax receivable	78		76
Financial guaranty variable interest entities' assets, at fair value	2,693		2,819
Other assets	286		262
Total assets	17,563		18,025
Liabilities and shareholders' equity
Unearned premium reserve	5,332		5,963
Loss and loss adjustment expense reserve	594		679
Reinsurance balances payable, net	185		171
Long-term debt	840		1,038
Credit derivative liabilities	2,151		1,773
Financial guaranty variable interest entities' liabilities with recourse, at fair value	2,169		2,397
Financial guaranty variable interest entities' liabilities without recourse, at fair value	1,018		1,061
Other liabilities	322		291
Total liabilities	12,611		13,373
Commitments and contingencies (See Note 12)
Common stock ($0.01 par value, 500,000,000 shares authorized; 193,988,878 and 182,235,798 shares issued and outstanding in 2012 and 2011)	2		2
Additional paid-in capital	2,722		2,570
Retained earnings	1,693		1,708
Accumulated other comprehensive income, net of tax of $200 and $135	531		368
Deferred equity compensation (320,193 shares in 2012 and 2011)	4		4
Total shareholders' equity	4,952		4,652
Total liabilities and shareholders' equity	$ 17,563		$ 18,025

[1] Excludes $30 million and $29 million as of September 30, 2012 and 2011, respectively, related to consolidated FG VIEs.