REVENUE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	$ 1,865	$ 1,693
Timberlands
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	505	486
Timberlands | Delivered logs
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	462	420
Timberlands | Stumpage and pay-as-cut timber
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	15	12
Timberlands | Recreational and other lease revenue
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	14	14
Timberlands | Other products
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	14	40
Timberlands | West | Delivered logs
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	266	225
Timberlands | South | Delivered logs
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	157	148
Timberlands | North | Delivered logs
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	25	27
Timberlands | Other | Delivered logs
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	14	20
Timberlands | Domestic sales | West | Delivered logs
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	137	119
Timberlands | Export sales | West | Delivered logs
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	129	106
RE & ENR
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	51	53
RE & ENR | Real estate
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	34	37
RE & ENR | Energy and natural resources
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	17	16
Wood Products
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	1,309	1,154
Wood Products | Structural lumber
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	569	478
Wood Products | Engineered solid section
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	129	117
Wood Products | Engineered i-joists
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	78	73
Wood Products | Oriented strand board
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	232	203
Wood Products | Softwood plywood
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	50	44
Wood Products | Medium density fiberboard
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	43	47
Wood Products | Complementary building products
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	137	122
Wood Products | Other products
Revenue from External Customer [Line Items]
Sales to unaffiliated customers	$ 71	$ 70