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STOCK-BASED COMPENSATION (Tables)
9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Expense
Stock-based compensation expense related to awards issued under the Company's incentive compensation plans for the three and nine months ended September 30, 2024 and 2023 was as follows (in millions):
 Three Months Ended
September 30,
Nine Months Ended
September 30,
 2024202320242023
Cost of sales$6.1 $4.7 $20.8 $16.3 
Selling, general, and administrative expenses20.4 17.2 62.4 57.3 
Research and development expenses8.7 7.2 28.3 23.7 
Total stock-based compensation expense35.2 29.1 111.5 97.3 
Income tax benefit(6.0)(4.7)(17.5)(14.5)
Total stock-based compensation expense, net of tax$29.2 $24.4 $94.0 $82.8 
Schedule of Weighted-Average Assumptions for Options Granted
The following table includes the weighted-average grant-date fair values of stock options granted during the periods indicated and the related weighted-average assumptions used in the Black-Scholes option pricing model:
 Option Awards
Three Months Ended
September 30,
Nine Months Ended
September 30,
 2024202320242023
Risk-free interest rate4.2 %4.3 %4.5%3.4%
Expected dividend yieldNoneNoneNoneNone
Expected volatility31.0 %32.7 %30.9%32.8%
Expected term (years)5.55.25.35.1
Fair value, per option$32.15 $31.16 $31.30 $31.02 
Schedule of Weighted-Average Assumptions for ESPP Subscriptions Granted
The following table includes the weighted-average grant-date fair values for ESPP subscriptions granted during the periods indicated and the related weighted-average assumptions used in the Black-Scholes option pricing model:
 ESPP
Three Months Ended
September 30,
Nine Months Ended
September 30,
 2024202320242023
Risk-free interest rate5.3 %5.3 %5.2%4.6%
Expected dividend yieldNoneNoneNoneNone
Expected volatility29.5 %34.8 %33.5%31.5%
Expected term (years)0.60.60.60.6
Fair value, per share$16.51 $18.53 $25.01$19.03