Income Taxes - Components of Net Deferred Tax Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Unrealized losses on credit derivative financial instruments, net	$ 402	$ 425
Unearned premium reserves, net	63	109
Loss and LAE reserve	134	90
Tax and loss bonds	33	15
Net operating loss (NOL) carry forward	5	7
Alternative minimum tax credit	90	58
Tax basis step-up	5	5
Foreign tax credit	37	30
FG VIEs	29	179
DAC	40	59
Investment basis difference	73	82
Other	64	48
Total deferred income tax assets	975	1,107
Deferred tax liabilities:
Contingency reserves	47	15
Public debt	98	100
Unrealized appreciation on investments	68	198
Unrealized gains on CCS	16	12
Market discount	24	42
Other	34	19
Total deferred income tax liabilities	287	386
Net deferred income tax asset	$ 688	$ 721