BUSINESS SEGMENTS -Reconciliation of Assets from Segments to Consolidated (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		$ 12,470
Continuing operations
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 21,779	12,470
Continuing operations | Operating segments | Timberlands and Real Estate & ENR
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	15,447	7,260
Continuing operations | Operating segments | Wood Products
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,838	1,541
Continuing operations | Operating segments | Cellulose Fibers
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,980	1,984
Continuing operations | Unallocated Items
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 2,514	$ 1,685