REVENUE RECOGNITION Revenue by Major Products (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue from External Customer
Net sales	$ 1,643	$ 1,865
Timberlands
Revenue from External Customer
Net sales	431	490
Timberlands | Delivered logs
Revenue from External Customer
Net sales	393	448
Timberlands | Stumpage and pay-as-cut timber
Revenue from External Customer
Net sales	9	15
Timberlands | Recreational and other lease revenue
Revenue from External Customer
Net sales	15	14
Timberlands | Other
Revenue from External Customer
Net sales	14	13
Timberlands | West | Delivered logs
Revenue from External Customer
Net sales	205	266
Timberlands | South | Delivered logs
Revenue from External Customer
Net sales	159	157
Timberlands | North | Delivered logs
Revenue from External Customer
Net sales	29	25
Timberlands | Domestic grade sales | West | Delivered logs
Revenue from External Customer
Net sales	101	137
Timberlands | Export grade sales | West | Delivered logs
Revenue from External Customer
Net sales	104	129
Real Estate & ENR
Revenue from External Customer
Net sales	118	51
Real Estate & ENR | Real estate
Revenue from External Customer
Net sales	96	34
Real Estate & ENR | Energy and natural resources
Revenue from External Customer
Net sales	22	17
Wood Products
Revenue from External Customer
Net sales	1,094	1,324
Wood Products | Structural lumber
Revenue from External Customer
Net sales	444	569
Wood Products | Oriented strand board
Revenue from External Customer
Net sales	160	232
Wood Products | Engineered solid section
Revenue from External Customer
Net sales	116	129
Wood Products | Engineered I-joists
Revenue from External Customer
Net sales	70	78
Wood Products | Softwood plywood
Revenue from External Customer
Net sales	44	50
Wood Products | Medium density fiberboard
Revenue from External Customer
Net sales	38	43
Wood Products | Complementary building products
Revenue from External Customer
Net sales	137	137
Wood Products | Other
Revenue from External Customer
Net sales	$ 85	$ 86