Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Comprehensive Income Loss Textuals [Abstract]
Net unrealized securities gains (losses), tax	$ (10)	$ 1	$ (11)	$ 24
Foreign currency translation adjustments, tax	(48)	(55)	40	(78)
Net unrealized pension and other postretirement benefit gains, tax	$ (3)	$ 5	$ 16	$ 20