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Benefit Plans
3 Months Ended
Mar. 31, 2022
Retirement Benefits [Abstract]  
Benefit Plans Benefit Plans
Components of net periodic benefit expense for our pension plans for the three months ended March 31, 2022 and 2021 were as follows:
Three months ended
In millionsMarch 31,
2022
March 31,
2021
Service cost$0.6 $0.7 
Interest cost0.6 0.5 
Expected return on plan assets(0.1)(0.1)
Net periodic benefit expense$1.1 $1.1 
Components of net periodic benefit expense for our other post-retirement plans for the three months ended March 31, 2022 and 2021 were not material