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SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION
9 Months Ended
Sep. 30, 2026
Disclosure Text Block Supplement [Abstract]  
SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION
Temporary Investments 

Temporary investments with an original maturity of three months or less and money market funds with greater than three month maturities but with the right to redeem without notices are treated as cash equivalents and stated at cost which approximates fair value. Temporary investments totaled $362 million and $477 million at September 30, 2026 and December 31, 2025, respectively.

Accounts and Notes Receivable, Net

In millionsSeptember 30, 2026December 31, 2025
Trade (less allowances of $69 and $70, respectively)
$3,755 $3,355 
Other569 436 
Total$4,324 $3,791 

As a result of the DS Smith acquisition, IP has a trade receivable factoring program that allows the Company to sell trade receivables without recourse.
Inventories

In millionsSeptember 30, 2026December 31, 2025
Raw materials$440 $447 
Finished packaging products812 792 
Operating supplies734 691 
Other133 82 
Total$2,119 $2,012 

Plants, Properties and Equipment  

Accumulated depreciation was $19.4 billion and $18.4 billion at September 30, 2026 and December 31, 2025, respectively. Depreciation expense was $445 million and $1.0 billion for the three months ended September 30, 2026 and 2025, respectively, and $1.3 billion and $1.9 billion for the nine months ended September 30, 2026 and 2025, respectively. Included in depreciation expense was accelerated depreciation associated with our site closures of $33 million and $675 million for the three months ended September 30, 2026 and 2025, respectively, and $72 million and $872 million for the nine months ended September 30, 2026 and 2025, respectively.

Non-cash additions to plants, properties and equipment included within accounts payable were $151 million and $240 million at September 30, 2026 and December 31, 2025, respectively.

Accounts Payable  

Under supplier finance programs, International Paper agrees to pay the relevant banks the stated amount of confirmed invoices from its designated suppliers on the original maturity dates of the invoices. International Paper or the relevant banks may terminate the agreement on notice periods from 28 to 90 days. The supplier invoices that have been confirmed as valid under the program require payment in full on the due date with no terms exceeding 180 days. The accounts payable balance included $395 million and $368 million of supplier finance program liabilities as of September 30, 2026 and December 31, 2025, respectively.

Interest

Interest payments made during the nine months ended September 30, 2026 and 2025 were $424 million and $416 million, respectively.

Amounts related to interest were as follows: 
Three Months Ended
September 30
Nine Months Ended
September 30
In millions2026202520262025
Interest expense$133 $135 $396 $413 
Interest income37 50 137 136 
Capitalized interest costs10 9 30 20 

Asset Retirement Obligations

The Company recorded liabilities in Other Liabilities in the accompanying condensed consolidated balance sheet of $186 million and $193 million related to asset retirement obligations at September 30, 2026 and December 31, 2025, respectively.