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STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Restricted Stock Unit Activity The following table summarizes the Company’s restricted stock unit activity during the nine months ended September 30, 2024:
RSUs
Number of Shares
 (in millions)		Weighted-Average Grant-Date Fair Value
Outstanding at December 31, 202356 $22.36 
Granted72 $10.47 
Exercised / Vested(48)$16.28 
Forfeited / Cancelled(12)$19.49 
Outstanding at September 30, 202468 $14.66 
Vested and expected to vest at September 30, 202468 $14.66 
Schedule of Stock-Based Compensation Expense for the Stock Plans and 2021 Employee Stock Purchase Plan
The following table summarizes the Company’s stock-based compensation expense for the Stock Plans and 2021 Employee Stock Purchase Plan (“ESPP”) by line item in the Condensed Consolidated Statements of Operations (in millions):

Three Months Ended September 30,Nine Months Ended September 30,
2023202420232024
Cost of revenues$23 $6 $64 $46 
Research and development133 59 289 281 
Selling, general, and administrative86 46 253 211 
Total stock-based compensation expense$242 $111 $606 $538