- Loss and LAE Reported on the Consolidated Statements of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Guarantor Obligations [Line Items]
Subtotal	$ 40	$ (55)
Effect of consolidating FG VIEs	1	7
Loss and LAE	41	(48)
Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	41	(55)
Other
Guarantor Obligations [Line Items]
Subtotal	(1)	0
Prime first lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	0	0
Alt-A first lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	7	9
Option ARM | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(8)	(83)
First mortgage, subprime | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(8)	11
Total first lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(9)	(63)
Close ended second lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	0	20
HELOCs | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	8	3
Second lien | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	8	23
U.S. RMBS | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(1)	(40)
TruPS | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	(1)	0
Other structured finance | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	16	(12)
Structured finance | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	14	(52)
Public Finance U.S. | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	26	(4)
Public Finance Non-U.S. | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	1	1
Public finance | Financial guaranty insurance
Guarantor Obligations [Line Items]
Subtotal	$ 27	$ (3)