Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 2,563	$ 1,687	$ 2,035
Other Comprehensive Income (Loss):
Foreign currency translation adjustments, net of tax	(328)	406	(277)
Pension and other postretirement benefit adjustments, net of tax	(17)	114	(26)
Comprehensive Income	$ 2,218	$ 2,207	$ 1,732