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STOCK-BASED COMPENSATION (Tables)
9 Months Ended
Sep. 30, 2022
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, 2022 and 2021 was as follows (in millions):
 Three Months Ended
September 30,
Nine Months Ended
September 30,
 2022202120222021
Cost of sales$5.3 $4.9 $18.4 $16.1 
Selling, general, and administrative expenses18.1 15.9 57.9 50.7 
Research and development expenses6.9 5.8 22.6 18.3 
Total stock-based compensation expense30.3 26.6 98.9 85.1 
Income tax benefit(4.9)(4.7)(15.2)(13.5)
Total stock-based compensation expense, net of tax$25.4 $21.9 $83.7 $71.6 
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,
 2022202120222021
Risk-free interest rate3.2 %0.9 %3.0 %0.8 %
Expected dividend yieldNoneNoneNoneNone
Expected volatility31.5 %33.5 %31.5 %33.5 %
Expected term (years)4.95.35.05.0
Fair value, per option$32.00 $34.38 $34.77 $28.78 
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,
 2022202120222021
Risk-free interest rate2.5 %0.1 %0.5 %0.1 %
Expected dividend yieldNoneNoneNoneNone
Expected volatility31.1 %33.7 %32.0 %36.6 %
Expected term (years)0.80.70.60.6
Fair value, per share$21.53 $29.85 $28.18 $23.07