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SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION (Tables)
 9 Months Ended
Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Accounts and Notes Receivable Net
Accounts and notes receivable, net, by classification were:

In millions
September 30, 2025December 31, 2024
Accounts and notes receivable:
Trade
$369 $402 
Notes and other
24 27 
Total
$393 $429 
Schedule of Inventories
In millions
September 30, 2025December 31, 2024
Raw materials
$71 $56 
Finished paper and pulp products
233 178 
Operating supplies
121 107 
Other
9 20 
Total
$434 $361 
Schedule of Interest Expense
Amounts related to interest were as follows:

Three Months Ended September 30,Nine Months Ended September 30,
In millions
2025202420252024
Interest expense (a)
$12 $19 $36 $46 
Interest income
(2)(4)(5)(11)
Capitalized interest costs
(1)(1)(3)(3)
Total
$9 $14 $28 $32 

(a) Interest expense for the three months and nine months ended September 30, 2024 includes $5 million of debt extinguishment cost related to the third quarter debt refinancing.