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TIMBERLAND ACQUISITIONS AND DIVESTITURE - Additional Information (Details)
$ in Millions
Sep. 01, 2020
USD ($)
a
Mar. 26, 2020
USD ($)
Dec. 17, 2019
a
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Assets held for sale       $ 199 $ 140
Oregon          
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Area of timberlands agreed to be sold | a 149,000        
Proceeds from disposition of operations $ 385        
Area of timberlands agreed to be purchased | a 85,000        
Payments to acquire timberlands $ 426        
Assets held for sale       $ 199  
Montana          
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Area of timberlands agreed to be sold | a     630,000    
Proceeds from disposition of operations   $ 145