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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, 2018
Dec. 31, 2017
Dec. 31, 2016
Charges for integration and restructuring, closures and asset impairments      
Impairment of long-lived assets $ 1 $ 154 $ 16
Total charges for integration and restructuring, closures and asset impairments 2 194 170
Plum Creek      
Charges for integration and restructuring, closures and asset impairments      
Termination benefits 0 11 54
Acceleration of share-based compensation related to qualifying terminations (Note 17) 0 0 21
Acceleration of pension benefits related to qualifying terminations (Note 10) 0 0 5
Professional services 0 16 52
Other integration and restructuring costs 0 7 14
Total charges for integration and restructuring, closures and asset impairments 0 34 146
Other Closures and Restructuring      
Charges for integration and restructuring, closures and asset impairments      
Charges related to closures and other restructuring activities $ 1 $ 6 $ 8