Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income	$ 717	$ 699
Other Comprehensive (Loss) Income, net of tax
Foreign currency translation adjustments		49
Pension and OPEB adjustments	1
Net unrealized gains (losses) on cash flow hedges	2	(14)
Reclassification into earnings from cash flow hedges	1	2
Unrealized gains on available-for-sale securities	4	4
Other Comprehensive Income, net of tax	8	41
Comprehensive Income	725	740
Less: Comprehensive Income (Loss) Attributable to Noncontrolling Interests	1	6
Comprehensive Income Attributable to Parent	$ 724	$ 734