CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 426	$ 445	$ 1,030	$ 1,220
Other comprehensive income:
Gross unrealized investment gain	116	145	168	258
Effect of income taxes	(42)	(53)	(61)	(94)
Total unrealized investment gain, net of tax	74	92	107	164
Reclassification adjustment for net realized gains included in net income	(6)	(2)	(20)	(7)
Effect of income taxes	2	1	7	3
Total reclassification adjustment, net of tax	(4)	(1)	(13)	(4)
Other comprehensive income, net of tax	70	91	94	160
Comprehensive income	$ 496	$ 536	$ 1,124	$ 1,380