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Pensions and other postretirement benefit plans (Tables)
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Pension and Postretirement Benefits
The components of net periodic pension and postretirement benefits include the following:
Pension benefitsPostretirement benefits
Three months ended September 30,Three months ended September 30,
In thousands2025202420252024
Service cost - benefits earned during the period$248 $288 $8 $9 
Interest cost on benefit obligations(a)
20,919 20,501 527 530 
Expected return on plan assets(a)
(23,550)(24,356)— — 
Amortization of prior service cost (benefit)(a)
18 18 (143)(143)
Amortization of actuarial loss (gain)(a)
628 735 (419)(478)
Total benefit, net$(1,737)$(2,814)$(27)$(82)
(a) Amounts are included in Other income (expense), net on the condensed consolidated statements of operations and comprehensive income (loss).
Pension benefits
Postretirement benefits
Nine months ended September 30,Nine months ended September 30,
In thousands2025202420252024
Service cost - benefits earned during the period$744 $866 $24 $26 
Interest cost on benefit obligations(a)
62,143 61,092 1,579 1,590 
Expected return on plan assets(a)
(69,854)(72,509)— — 
Amortization of prior service cost (benefit)(a)
53 52 (427)(427)
Amortization of actuarial loss (gain)(a)
1,825 2,160 (1,256)(1,434)
Total benefit, net$(5,089)$(8,339)$(80)$(245)
(a) Amounts are included in Other income (expense), net on the condensed consolidated statements of operations and comprehensive income (loss).