CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 197	$ 103	$ 333	$ 212
Other comprehensive (loss) income
Change in unrealized holding (losses) gains on available-for-sale securities, net of tax benefit (expense) of $73, $(37), $45 and $(80), respectively	(136)	68	(83)	148
Reclassification adjustment for gross gains included in net income, net of tax benefit of $2, $2, $4 and $7, respectively	(4)	(3)	(7)	(11)
Other comprehensive (loss) income	(140)	65	(90)	137
Comprehensive income	57	168	243	349
Less: Comprehensive income attributable to noncontrolling interest in consolidated entity – Exchange	3	118	150	250
Total comprehensive income – Indemnity	$ 54	$ 50	$ 93	$ 99