Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 652	$ 536
Other Comprehensive Income (Loss):
Foreign currency translation adjustments, net of tax	83	154
Pension and other postretirement benefit adjustments, net of tax	9	10
Comprehensive Income	$ 744	$ 700