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Share-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Share-Based Compensation Expense The following table summarizes the share-based compensation expense recognized for the three and six months ended June 30:
Three months endedSix months ended
In millions2024202320242023
Stock options$0.9 $0.7 $3.0 $2.8 
RSUs3.6 3.1 9.0 8.1 
PSUs2.0 1.8 4.1 3.5 
Pre-tax expense6.5 5.6 16.1 14.4 
Tax benefit(0.7)(0.7)(1.6)(1.9)
After-tax expense$5.8 $4.9 $14.5 $12.5 
Grants of Stock Options and RSUs Grants issued during the six months ended June 30 were as follows:
 20242023
 Number
granted		Weighted-
average fair
value per award		Number
granted		Weighted-
average fair
value per award
Stock options127,963 $40.92 156,929 $33.66 
RSUs95,773 $128.95 126,739 $112.61 
Stock Options Fair Value Assumptions The following weighted-average assumptions were used during the six months ended June 30:
20242023
Dividend yield1.47 %1.60 %
Volatility29.29 %28.47 %
Risk-free rate of return4.29 %4.10 %
Expected life (years)6.06.0