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STOCK-BASED COMPENSATION (Tables)
6 Months Ended
Jun. 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 six months ended June 30, 2024 and 2023 was as follows (in millions):
 Three Months Ended
June 30,
Six Months Ended
June 30,
 2024202320242023
Cost of sales$7.5 $5.4 $14.7 $11.6 
Selling, general, and administrative expenses20.3 20.4 42.2 40.4 
Research and development expenses9.7 7.9 19.6 16.5 
Total stock-based compensation expense37.5 33.7 76.5 68.5 
Income tax benefit(6.0)(5.5)(11.5)(9.8)
Total stock-based compensation expense, net of tax$31.5 $28.2 $65.0 $58.7 
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
June 30,
Six Months Ended
June 30,
 2024202320242023
Risk-free interest rate4.5 %3.4 %4.5%3.4%
Expected dividend yieldNoneNoneNoneNone
Expected volatility30.9 %32.8 %30.9%32.8%
Expected term (years)5.25.15.25.1
Fair value, per option$31.24 $31.03 $31.26 $31.01 
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
June 30,
Six Months Ended
June 30,
 2024202320242023
Risk-free interest rate5.2 %4.7 %5.2%4.6%
Expected dividend yieldNoneNoneNoneNone
Expected volatility29.3 %34.8 %33.5%31.5%
Expected term (years)0.70.60.60.6
Fair value, per share$23.37 $22.02 $25.01$19.03