Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Comprehensive Income (Loss):
Tax on foreign currency translation	$ (18)	$ 0	$ (42)	$ 0
Tax on reclassification adjustment for amounts recognized in income	0	0	0	0
Defined benefit plans:
Tax on amortization of prior service cost and unrecognized gains and losses included in total benefit cost	9	2	27	5
Tax on decrease (increase) in net actuarial losses	0	0	11	3
Tax on immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures	0	0	0	0
Tax on prior service credit from plan amendments	0	0	0	0
Tax on deferred derivative gains (losses)	1	1	3	0
Tax on reclassification adjustment for amounts recognized in income	0	0	(2)	0
Tax on unrealized investment gains (losses)	$ 0	$ 0	$ 1	$ 0