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Equity Incentive Plans (Tables)
 12 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Share-Based Payment Arrangement, Activity
The following table summarizes our stock option and RSU activity for the year ended December 31, 2024:
Stock OptionsRSUs
Number of
Options
(in thousands)
Weighted-
Average
Exercise
Price		Weighted-
Average
Remaining
Contractual
Life (years)
Aggregate
Intrinsic
Value
(in billions)
Number
of RSUs
(in thousands)
Weighted-
Average
Grant
Date Fair
Value
Beginning of period344,021$35.11 19,088$225.01 
Granted14,979$235.22 12,045$223.98 
Exercised or released(10,469)$82.04 (7,515)$206.02 
Cancelled(3,996)$205.61 (4,957)$221.15 
End of period344,535$40.41 3.51$125.22 18,661$233.02 
Vested and expected to vest, December 31, 2024344,215$40.23 3.50$125.16 18,409$232.99 
Exercisable and vested, December 31, 2024323,847$27.75 3.14$121.79 
Schedule Of Share Based Payment Award Stock Options And Employee Stock Purchase Plan Valuation Assumptions The weighted-average assumptions used in the Black-Scholes model for stock options are as follows:
Year Ended December 31,
202420232022
Risk-free interest rate3.92 %3.90 %3.11 %
Expected term (in years)4.34.54.1
Expected volatility59 %63 %63 %
Dividend yield0.0 %0.0 %0.0 %
Grant date fair value per share$114.29 $121.62 $114.51 
Summary of Stock-Based Compensation Expense
The following table summarizes our stock-based compensation expense by line item in the consolidated statements of operations (in millions):
Year Ended December 31,
202420232022
Cost of revenues$776 $741 $594 
Research and development832 689 536 
Selling, general and administrative389 382 430 
Restructuring and other$2 $— $— 
Total$1,999 $1,812 $1,560