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Pension and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits
Pension and other postretirement benefit costs for the three months ended March 31, 2024 and 2023 were as follows:

Three Months Ended
March 31,
PensionOther Postretirement Benefits
In millions2024202320242023
Components of net periodic benefit cost:
Service cost$9 $9 $1 $1 
Interest cost23 23 6 6 
Expected return on plan assets(33)(32)(5)(5)
Amortization of actuarial loss (gain)2 1 (1)(1)
Total net periodic benefit cost (income)$1 $1 $1 $1 

The service cost component of net periodic benefit cost is presented within Cost of revenue and Selling, administrative, and research and development expenses in the Statement of Income while the other components of net periodic benefit cost are presented within Other income (expense).

The Company expects to contribute approximately $60 million to its pension plans and $37 million to its other postretirement benefit plans in 2024. As of March 31, 2024, contributions of $32 million to pension plans and $10 million to other postretirement benefit plans have been made.