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Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Stock Option and RSU Activity

The following table summarizes our stock option and RSU activity for the year ended December 31, 2023:

			Stock Options																								RSUs
			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 period			343,564						$	30.65																	21,333						$	162.32
Granted			9,521						$	226.50																	11,743						$	228.33
Exercised or released			(7,626)						$	43.07																	(11,085)						$	116.47
Cancelled			(1,438)						$	194.23																	(2,903)						$	192.22
End of period			344,021						$	35.11					4.31						$	73.57					19,088						$	225.01
Vested and expected to vest, December 31, 2023			340,884						$	33.38					4.27						$	73.45					18,446						$	225.76
Exercisable and vested, December 31, 2023			329,124						$	27.07					4.11						$	72.90

Schedule of Fair Value of Stock Option Award and ESPP on Grant Date

The weighted-average assumptions used in the Black-Scholes model for stock options are as follows:

			Year Ended December 31,
			2023						2022						2021
Risk-free interest rate			3.90		%				3.11		%				0.66		%
Expected term (in years)			4.5						4.1						4.3
Expected volatility			63		%				63		%				59		%
Dividend yield			0.0		%				0.0		%				0.0		%
Grant date fair value per share			$	121.62					$	114.51					$	128.02

Summary of Operational Milestone Based on Revenue or Adjusted EBITDA

The achievement status of the operational milestones as of December 31, 2023 is provided below.

Total Annualized Revenue												Annualized Adjusted EBITDA
Milestone (in billions)						Achievement Status						Milestone (in billions)						Achievement Status
$	20.0					Achieved						$	1.5					Achieved
$	35.0					Achieved						$	3.0					Achieved
$	55.0					Achieved						$	4.5					Achieved
$	75.0					Achieved						$	6.0					Achieved
$	100.0					-						$	8.0					Achieved
$	125.0					-						$	10.0					Achieved
$	150.0					-						$	12.0					Achieved
$	175.0					-						$	14.0					Achieved

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,
			2023						2022						2021
Cost of revenues			$	741					$	594					$	421
Research and development			689						536						448
Selling, general and administrative			382						430						1,252
Total			$	1,812					$	1,560					$	2,121

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