Financial Guaranty Insurance Contracts (Details 3) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Gross
Total	$ 5,332		$ 5,963
Ceded
Total	550		709
Net
Unearned Premiums, Net	4,782	[1]	5,254	[1]
Total net unearned premium reserve related to FG VIE	226		274
Net
Salvage and subrogation recoverable	430		368
Reduction in net present value of expected loss due to consolidating FG VIEs	195
Reduction in future scheduled amortization of deferred premium revenue due to consolidating FG VIEs	364
Financial Guaranty
Gross
Deferred premium revenue	5,476		6,046
Contra-paid	(152)		(92)
Total	5,324		5,954
Ceded
Deferred premium revenue	576		728
Contra-paid	(26)		(19)
Total	550		709
Net
Deferred premium revenue	4,900	[1]	5,318	[1]
Contra-paid	126	[1]	73	[1]
Unearned Premiums, Net	4,774	[1]	5,245	[1]
Scheduled Net Earned Premium
2012 (October 1 - December 31)	141
Subtotal 2012	141
2013	490
2014	433
2015	379
2016	343
2017-2021	1,294
2022-2026	814
2027-2031	498
After 2031	508
Total present value basis	4,900	[2],[3]
Discount	270
Total future value	5,170
Net Expected Loss to be Expensed
2012 (October 1 - December 31)	25
Subtotal 2012	25
2013	75
2014	49
2015	38
2016	35
2017-2021	124
2022-2026	66
2027-2031	34
After 2031	30
Total present value basis	476	[2],[3]
Discount	235
Total future value	711
Net
2012 (October 1 - December 31)	116
Subtotal 2012	116
2013	415
2014	384
2015	341
2016	308
2017-2021	1,170
2022-2026	748
2027-2031	464
After 2031	478
Total present value basis	4,424	[2],[3]
Discount	35
Total future value	4,459
Other
Gross
Total	8		9
Ceded
Total	0		0
Net
Unearned Premiums, Net	$ 8	[1]	$ 9	[1]

[1] Total net unearned premium reserve excludes $226 million and $274 million related to FG VIEs as of September 30, 2012 and December 31, 2011, respectively.

[2] Consolidation of FG VIEs resulted in reductions of $364 million in future scheduled net earned premium and $195 million in net expected loss to be expensed.

[3] Balances represent discounted amounts.