CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 650	$ 781	$ 1,682	$ 2,026
Changes in:
Unrealized net capital gains and losses	(540)	(323)	(1,047)	181
Unrealized foreign currency translation adjustments	(14)	(17)	(50)	(20)
Unrecognized pension and other postretirement benefit cost	25	12	74	31
Other comprehensive (loss) income, after-tax	(529)	(328)	(1,023)	192
Comprehensive income	$ 121	$ 453	$ 659	$ 2,218