CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 236	$ 192
Items related to employee benefit plans:
Change in net actuarial loss, net of $(16) and $(15) tax	26	23
Change in net prior service costs, net of $(1) and $(2) tax	2	4
Foreign currency translation adjustment and other, net of $- and $- tax	(1)	(11)
Other comprehensive income	27	16
COMPREHENSIVE INCOME	$ 263	$ 208