v3.26.3
Pension and Other Postretirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Pension and Other Postretirement Benefit Costs
Pension and other postretirement benefit costs for the three and nine months ended September 30, 2026 and 2025 were as follows:

Three Months EndedNine Months Ended
September 30,September 30,
PensionOther Postretirement BenefitsPensionOther Postretirement Benefits
In millions20262025202620252026202520262025
Components of net periodic benefit cost:
Service cost$8 $8 $— $1 $22 $24 $2 $3 
Interest cost21 23 6 6 63 69 17 18 
Expected return on plan assets(32)(33)(7)(6)(95)(97)(21)(19)
Amortization of actuarial loss (gain)3 1 (2)(3)10 3 (6)(7)
Amortization of prior service cost— 1 — — — 1 — — 
Settlements— — — — — 1 — — 
Total net periodic benefit cost (income)$— $— $(3)$(2)$— $1 $(8)$(5)