BUSINESS SEGMENTS - Additional Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation, depletion and amortization	$ 486	$ 521	$ 565
Charges for integration and restructuring, closures and asset impairments (Note 18)	2	194	170
Capital expenditures	427	419	425
Operating segments | Timberlands
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation, depletion and amortization	319	356	366
Charges for integration and restructuring, closures and asset impairments (Note 18)	0	147	0
Capital expenditures	117	115	116
Operating segments | RE & ENR
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation, depletion and amortization	14	15	13
Charges for integration and restructuring, closures and asset impairments (Note 18)	0	0	15
Capital expenditures	0	2	1
Operating segments | Wood Products
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation, depletion and amortization	149	145	129
Charges for integration and restructuring, closures and asset impairments (Note 18)	2	13	7
Capital expenditures	306	299	297
Unallocated Items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation, depletion and amortization	4	5	4
Charges for integration and restructuring, closures and asset impairments (Note 18)	0	34	148
Capital expenditures	$ 4	$ 3	11
Continuing operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation, depletion and amortization			$ 512