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RETIREMENT PLANS
3 Months Ended
Mar. 31, 2026
Retirement Benefits [Abstract]  
RETIREMENT PLANS RETIREMENT PLANS
International Paper operates both defined benefit and defined contribution pension plans as well as other post retirement benefit plans throughout our operations in accordance with local conditions and practice.

We sponsor and maintain the Retirement Plan of International Paper Company (the "Pension Plan"), a tax-qualified defined benefit pension plan that provides retirement benefits to substantially all hourly and union employees who work at a participating business unit. The Pension Plan was frozen as of January 1, 2019 for salaried participants.

The Pension Plan provides defined pension benefits based on years of credited service and either final average earnings (salaried employees and hourly employees receiving salaried benefits), hourly job rates or specified benefit rates (hourly and union employees).
In connection with our acquisition, International Paper acquired the existing DS Smith Group Pension Scheme (the "Group Scheme"), a U.K. funded defined benefit plan providing pension benefits and lump sum benefits to members and dependents. The Group Scheme closed to new entrants and future accruals as of April 30, 2011. International Paper also acquired various non-U.S. retirement benefit arrangements as part of the acquisition, some of which are considered to be defined benefit pension plans for accounting purposes.

Net periodic pension expense (income) for our qualified and nonqualified defined benefit plans and the Group Scheme, is comprised of the following: 

 Three Months Ended
March 31,
In millions20262025
Service cost$12 $10 
Interest cost124 124 
Expected return on plan assets(159)(151)
Actuarial loss12 18 
Amortization of prior service cost3 
Settlement 
Net periodic pension expense (income)$(8)$13 

The components of net periodic pension expense (income) other than the Service cost component are included in Non-operating pension expense (income) in the condensed consolidated statement of operations.

The Company’s funding policy for our pension plans is to contribute amounts sufficient to meet legal funding requirements, plus any additional amounts that the Company may determine to be appropriate considering the funded status of the plan, tax deductibility, the cash flows generated by the Company, and other factors. The Company made no voluntary cash contributions to the qualified pension plan in the first three months of 2026 or 2025. The nonqualified defined benefit plans are funded to the extent of benefit payments, which totaled $5 million and $33 million for the three months ended March 31, 2026 and 2025, respectively.