Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income	$ 955	$ 1,181	$ 2,361	$ 2,392
Other Comprehensive Income, net of tax
Foreign currency translation adjustments	0	(12)	0	95
Pension and OPEB adjustments	0	0	2	2
Net unrealized gains (losses) on cash flow hedges	2	6	(2)	(19)
Reclassification into earnings from cash flow hedges	(2)	1	3	3
Unrealized gains on available-for-sale securities	2	0	10	7
Other Comprehensive Income (Loss), net of tax	2	(5)	13	88
Comprehensive Income	957	1,176	2,374	2,480
Less: Comprehensive Income Attributable to Noncontrolling Interests	1	4	5	16
Comprehensive Income (Loss) Attributable to Parent	$ 956	$ 1,172	$ 2,369	$ 2,464