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Share-Based Compensation - (Tables)
9 Months Ended
Oct. 01, 2021
Share-based Payment Arrangement [Abstract]  
Summary Of Share-Based Compensation Expense
Total share-based compensation expense related to the Company's RSUs, stock grant awards and the ESPP was recorded within the Consolidated Statements of Operations and Comprehensive Income as follows (in millions):
Quarters EndedNine Months Ended
October 1, 2021October 2, 2020October 1, 2021October 2, 2020
Cost of revenue$3.6 $3.1 $11.8 $8.5 
Research and development5.4 4.8 18.4 13.2 
Selling and marketing3.7 3.4 12.5 9.5 
General and administrative10.0 6.2 31.4 20.0 
Share-based compensation expense$22.7 $17.5 $74.1 $51.2 
     Income tax benefit(4.8)(3.7)(15.6)(10.8)
Share-based compensation expense, net of taxes$17.9 $13.8 $58.5 $40.4 
Summary Of Restricted Stock Units Transactions A summary of the RSU transactions for the nine months ended October 1, 2021 is as follows (in millions, except per share data):
 Number of SharesWeighted-Average Grant Date Fair Value Per Share
Non-vested RSUs at December 31, 202011.3 $20.73 
Granted2.4 41.26 
Released(2.8)21.40 
Forfeited(4.5)21.86 
Non-vested RSUs at October 1, 20216.4 27.33