CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 193	$ 269	$ 396	$ 567
Items related to employee benefit plans:
Change in net actuarial loss, net of $(2) and $(8) tax	3	11	6	24
Change in net prior service credit, net of $(3), $—, $(5) and $(1) tax	5	1	8	2
Foreign currency translation adjustment and other, net of $- and $(2) tax	8	(5)	9	(13)
Other comprehensive income	16	7	23	13
COMPREHENSIVE INCOME	$ 209	$ 276	$ 419	$ 580