OTHER OPERATING INCOME, NET - Items Included in Other Operating Income, Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gain on disposition of nonstrategic assets	$ (4)	$ (1)	$ (6)	$ (24)
Foreign exchange losses (gains), net	(8)	(12)	21	2
Land management income	(10)	(9)	(18)	(16)
Other, net	7	2	3	(12)
Total other operating income, net	(15)	(65)	0	(140)
U.S. and Canadian Other Postretirement Plans
Gain on postretirement plan amendment (Note 6)	$ 0	$ (45)	$ 0	$ (90)