CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 115	$ 163
Items related to employee benefit plans:
Change in net actuarial loss, net of $(11) and $(20) tax	33	31
Change in net prior service costs, net of $(1) and $(1) tax	2	2
Foreign currency translation adjustment and other, net of $(14) and $— tax	79	(2)
Other comprehensive income	114	31
COMPREHENSIVE INCOME	$ 229	$ 194