CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 109	$ 290
Other comprehensive income (loss)
Change in unrealized holding gains (losses) on available-for-sale securities, net of tax (expense) benefit of $(43) and $6, respectively	80	(12)
Reclassification adjustment for gross gains included in net income, net of tax benefit of $5 and $5, respectively	(8)	(10)
Other comprehensive income (loss)	72	(22)
Comprehensive income	181	268
Less: Comprehensive income attributable to noncontrolling interest in consolidated entity – Exchange	132	232
Total comprehensive income – Indemnity	$ 49	$ 36