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Stock-Based Compensation
 6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement, Noncash Expense [Abstract]  
Stock-Based Compensation Stock-based Compensation
Stock-based compensation is classified in the Condensed Consolidated Statements of Comprehensive Income in the same expense line items as cash compensation. The following table presents the classification of stock-based compensation:
 Three Months Ended June 30,Six Months Ended June 30,
2024202320242023
 (In millions)
Cost of revenues$2.0 $2.0 $4.0 $3.3 
Research and development2.8 2.5 5.4 5.0 
Selling, general and administrative9.5 11.2 20.0 21.2 
Stock-based compensation expense14.3 15.7 29.4 29.5 
Capitalization (included in Property and equipment, net)0.3 0.2 0.5 0.5 
Total stock-based compensation$14.6 $15.9 $29.9 $30.0 
The following table presents the nature of the Company’s total stock-based compensation:
 Three Months Ended June 30,Six Months Ended June 30,
2024202320242023
 (In millions)
RSUs$11.9 $11.6 $24.0 $22.5 
Performance-based RSUs1.6 3.2 3.7 5.3 
ESPP1.1 1.1 2.2 2.2 
Total stock-based compensation$14.6 $15.9 $29.9 $30.0