Financial Guaranty Insurance Premiums - Net Earned Premiums (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Financial Guaranty Insurance Premiums [Line Items]
Accretion of discount on net premiums receivable	$ (7)		$ (9)
Net earned premiums	132		248
Net earned premiums, consolidated FG VIEs	17		18
Financial guaranty insurance
Financial Guaranty Insurance Premiums [Line Items]
Scheduled net earned premiums	107		128
Acceleration of net earned premiums	19		113
Accretion of discount on net premiums receivable	6		7
Net earned premiums	$ 132	[1]	$ 248	[1]

[1] Excludes $17 million and $18 million for First Quarter 2014 and 2013, respectively, related to consolidated FG VIEs.