- Loss and LAE Reported on the Consolidated Statements of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Guarantor Obligations [Line Items]
Subtotal	$ (30)	$ 66	$ 75	$ 95
Effect of consolidating FG VIEs	(14)	(11)	(21)	(26)
Loss and LAE	(44)	55	54	69
Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(30)	66	76	95
Other
Guarantor Obligations [Line Items]
Subtotal	0	0	(1)	0
Prime first lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	0	1	0	1
Alt-A first lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	4	(7)	21	(7)
Option ARM | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	9	22	(21)	(39)
First mortgage, subprime | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(7)	31	(5)	65
Total first lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	6	47	(5)	20
Close ended second lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	1	0	0	19
HELOCs | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(45)	(28)	(55)	(44)
Second lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(44)	(28)	(55)	(25)
U.S. RMBS | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(38)	19	(60)	(5)
TruPS | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	0	0	(1)	(1)
Other structured finance | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	6	(12)	26	(33)
Structured finance | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(32)	7	(35)	(39)
Public Finance U.S. | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	3	47	112	121
Public Finance Non-U.S. | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(1)	12	(1)	13
Public finance | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	$ 2	$ 59	$ 111	$ 134