INVENTORIES Inventories (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Inventory [Line Items]
Total	$ 409	$ 416
Logs
Inventory [Line Items]
LIFO inventories	13	19
Moving average cost or FIFO inventories	35	28
Lumber, plywood, panels and fiberboard
Inventory [Line Items]
LIFO inventories	65	82
Lumber, plywood, panels, fiberboard and engineered wood products
Inventory [Line Items]
Moving average cost or FIFO inventories	86	84
Other products
Inventory [Line Items]
LIFO inventories	9	10
Moving average cost or FIFO inventories	99	98
Materials and supplies
Inventory [Line Items]
Moving average cost or FIFO inventories	$ 102	$ 95