Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Summary of the Equity-Based Compensation Expense Included in the Statements of Operations

The following table shows a summary of the equity-based compensation expense included in the Condensed Consolidated Statements of Operations:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Selling, general and administrative	$	7.8	$	9.2	$	22.9	$	25.6
Research and development		2.3		5.0		8.4		13.6
Cost of sales		1.2		2.2		4.2		6.1
Total equity-based compensation expense	$	11.3	$	16.4	$	35.5	$	45.3

Summary of RSU Activity

The following table summarizes the RSU activity (in millions, except per share data):

	Restricted Stock Units			Weighted Average Grant Date Fair Value Per Share
Non-vested share units at June 30, 2023		12.6		$	6.90
Forfeited		(0.4	)	$	8.64
Non-vested share units at September 30, 2023		12.2		$	6.83
Non-vested share units at December 31, 2022		11.2		$	10.66
Granted		7.5		$	4.58
Vested and shares issued		(5.2	)	$	11.10
Forfeited		(1.3	)	$	10.06
Non-vested share units at September 30, 2023		12.2		$	6.83

Summary of Weighted Average Assumptions Used to Estimate Fair Value of Stock Option

The following table presents the weighted average assumptions used to estimate the fair value of the awards granted:

	Nine Months Ended September 30,
	2023			2022
Risk-free interest rate		4.4	%		1.7	%
Expected volatility		67.2	%		61.2	%
Weighted average fair value at grant date	$	9.19		$	11.21

Summary of PSU Activity

The following table summarizes the PSU activity (in millions, except per share data):

	Performance Share Units			Weighted Average Grant Date Fair Value Per Share
Non-vested share units at June 30, 2023		6.8		$	6.72
Forfeited		(0.1	)	$	8.72
Non-vested share units at September 30, 2023		6.7		$	6.69
Non-vested share units at December 31, 2022		2.9		$	8.14
Granted		4.0		$	5.78
Forfeited		(0.2	)	$	9.48
Non-vested share units at September 30, 2023		6.7		$	6.69