INVENTORIES Inventories (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Inventory [Line Items]
Total	$ 414	$ 383
Logs
Inventory [Line Items]
LIFO inventories	15	17
FIFO or moving average cost inventories	38	38
Lumber, plywood, panels, and fiberboard
Inventory [Line Items]
LIFO inventories	71	66
Lumber, plywood, panels and engineered wood products
Inventory [Line Items]
FIFO or moving average cost inventories	110	91
Other products
Inventory [Line Items]
LIFO inventories	15	10
FIFO or moving average cost inventories	80	77
Materials and supplies
Inventory [Line Items]
FIFO or moving average cost inventories	$ 85	$ 84