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EQUITY METHOD INVESTMENTS Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]            
Equity earnings (loss), net of taxes $ 27 $ 92 $ 221 $ 257    
Document Period End Date     Sep. 30, 2019      
Equity method dividends received     $ 260 130    
Reportable Subsegments | Graphic Packaging LLC [Member]            
Schedule of Equity Method Investments [Line Items]            
Percentage of equity interest 21.60%   21.60%     20.50%
Equity earnings (loss), net of taxes $ 10 19 $ 37 36    
Equity method dividends received     20 12    
Equity method investments 1,100   1,100   $ 1,100  
Equity method investment, difference between carrying amount and underlying equity 534   534   562  
Revenue from related parties $ 69 62 $ 212 180    
Reportable Subsegments | Ilim Holding            
Schedule of Equity Method Investments [Line Items]            
Percentage of equity interest 50.00%   50.00%      
Equity earnings (loss), net of taxes $ 18 74 $ 186 223    
Equity method dividends received     239 118    
Equity method investments 477   477   478  
Equity method investment, difference between carrying amount and underlying equity 146   146   $ 145  
Related party transaction, purchases from related party $ 51 $ 50 $ 162 $ 159