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STOCK-BASED COMPENSATION (Tables)
9 Months Ended
Sep. 30, 2023
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, 2023 and 2022 was as follows (in millions):
 Three Months Ended
September 30,
Nine Months Ended
September 30,
 2023202220232022
Cost of sales$5.5 $5.3 $18.7 $18.4 
Selling, general, and administrative expenses19.1 18.1 63.9 57.9 
Research and development expenses8.0 6.9 26.3 22.6 
Total stock-based compensation expense32.6 30.3 108.9 98.9 
Income tax benefit(5.8)(4.9)(17.3)(15.2)
Total stock-based compensation expense, net of tax$26.8 $25.4 $91.6 $83.7 
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
September 30,
Nine Months Ended
September 30,
 2023202220232022
Risk-free interest rate4.3 %3.2 %3.4 %3.0 %
Expected dividend yieldNoneNoneNoneNone
Expected volatility32.7 %31.5 %32.8 %31.5 %
Expected term (years)5.24.95.15.0
Fair value, per option$31.16 $32.00 $31.02 $34.77 
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,
 2023202220232022
Risk-free interest rate5.3 %2.5 %4.6 %0.5 %
Expected dividend yieldNoneNoneNoneNone
Expected volatility34.8 %31.1 %31.5 %32.0 %
Expected term (years)0.60.80.60.6
Fair value, per share$18.53 $21.53 $19.03 $28.18