REVENUE RECOGNITION (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from External Customer
Revenues	$ 1,636	$ 1,910	$ 2,065	$ 1,865	$ 1,823	$ 1,872	$ 1,808	$ 1,693	$ 7,476	$ 7,196	$ 6,365
Timberlands
Revenue from External Customer
Revenues									1,915	1,942	1,805
Timberlands | Delivered logs
Revenue from External Customer
Revenues									1,752	1,685	1,560
Timberlands | Stumpage and pay-as-cut timber
Revenue from External Customer
Revenues									59	73	85
Timberlands | Recreational and other lease revenue
Revenue from External Customer
Revenues									59	59	44
Timberlands | Other
Revenue from External Customer
Revenues									45	125	116
Timberlands | West | Delivered logs
Revenue from External Customer
Revenues									987	915	865
Timberlands | South | Delivered logs
Revenue from External Customer
Revenues									625	616	566
Timberlands | North | Delivered logs
Revenue from External Customer
Revenues									99	95	91
Timberlands | Other | Delivered logs
Revenue from External Customer
Revenues									41	59	38
Timberlands | Domestic sales | West | Delivered logs
Revenue from External Customer
Revenues									503	473	410
Timberlands | Export Sales | West | Delivered logs
Revenue from External Customer
Revenues									484	442	455
RE & ENR | Real estate sales
Revenue from External Customer
Revenues									229	208	172
RE & ENR | Energy and natural resources products [Member]
Revenue from External Customer
Revenues									77	72	54
Wood Products
Revenue from External Customer
Revenues									5,255	4,974	4,334
Wood Products | Structural lumber
Revenue from External Customer
Revenues									2,258	2,058	1,839
Wood Products | Oriented Strand Board
Revenue from External Customer
Revenues									891	904	707
Wood Products | Engineered Solid Section
Revenue from External Customer
Revenues									521	500	450
Wood Products | Engineered I-joists
Revenue from External Customer
Revenues									336	336	290
Wood Products | Softwood Plywood
Revenue from External Customer
Revenues									200	176	174
Wood Products | Medium density fiberboard
Revenue from External Customer
Revenues									177	183	158
Wood Products | Complementary building products
Revenue from External Customer
Revenues									584	541	515
Wood Products | Other
Revenue from External Customer
Revenues									$ 288	$ 276	201
Continuing operations
Revenue from External Customer
Revenues											$ 6,365