CHARGES FOR INTEGRATION AND RESTRUCTURING, CLOSURES AND ASSET IMPAIRMENTS - Items Included in Our Charges for Integration and Restructuring, Closures and Asset Impairments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Charges for integration and restructuring, closures, and asset impairments
Termination benefits	$ 58
Pension and postretirement charges	0	$ 0	$ 3
Restructuring Charges	8	10	42
Impairment of long-lived assets	16	15	2
Total charges for integration and restructuring, closures and asset impairments	170	39	44
Plum Creek
Charges for integration and restructuring, closures, and asset impairments
Termination benefits	54	0	0
Acceleration of share-based compensation related to qualifying terminations (Note 16)	21	0	0
Acceleration of pension benefits related to qualifying terminations (Note 9)	5	0	0
Professional services	52	14	0
Other integration and restructuring costs	14	0	0
Total charges for integration and restructuring, closures and asset impairments	146	14	0
Other Closures and Restructuring
Charges for integration and restructuring, closures, and asset impairments
Termination benefits	4	4	27
Other closures and restructuring costs	$ 4	$ 6	$ 12