CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 103	$ 177	$ 212	$ 467
Other comprehensive income (loss)
Change in unrealized holding gains (losses) on available-for-sale securities, net of tax (expense) benefit of $(37), $105, $(80), and $111 respectively	68	(194)	148	(206)
Reclassification adjustment for gross gains included in net income, net of tax benefit of $2, $2, $7, and $7, respectively	(3)	(3)	(11)	(13)
Other comprehensive income (loss)	65	(197)	137	(219)
Comprehensive income (loss)	168	(20)	349	248
Less: Comprehensive income (loss) attributable to noncontrolling interest in consolidated entity – Exchange	118	(60)	250	172
Total comprehensive income – Indemnity	$ 50	$ 40	$ 99	$ 76