OTHER OPERATING COSTS (INCOME), NET - Various Income and Expense Items Included in Other Operating Income, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Gain on postretirement plan amendment (Note 9)	$ 0	$ (151)	$ 0
Gain on disposition of nonstrategic assets	(12)	(27)	(19)
Foreign exchange losses, net	47	27	7
Land management income	(37)	(34)	(28)
Litigation expense, net	23	9	16
Other, net	(17)	(25)	(11)
Total	18	(201)	(35)
Plum Creek Timber Company, Inc. [Member]
Plum Creek merger-related costs	$ 14	$ 0	$ 0