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SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Inventories by Major Category (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Inventory [Line Items]    
Raw materials $ 285 $ 274
Finished pulp, paper and packaging 1,075 1,337
Operating supplies 589 615
Other 108 87
Total $ 2,057 $ 2,313