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):
Tax on foreign currency translation	$ 10	$ 0	$ (24)	$ 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	1	18	3
Tax on decrease (increase) in net actuarial losses	11	3	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 deferred derivative gains (losses)	0	(1)	2	(1)
Tax on reclassification adjustment for amounts recognized in income	(1)	0	(2)	0
Tax on unrealized investment gains (losses)	$ (3)	$ 0	$ 1	$ 0