Employee Stock Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Summarizes the Components of Stock-Based Compensation Expense

The following table summarizes the components of stock-based compensation expense recognized in our Consolidated Statements of Income for the periods indicated:

	2021		2020		2019
(In millions)
Restricted stock units	$	110.5	$	73.2	$	67.3
Stock options	1.3		1.5		0.6
ESPP	10.8		8.3		7.1
Total stock-based compensation expense	$	122.6	$	83.0	$	75.0

Stock-based compensation expense was allocated as follows:

	2021		2020		2019
(In millions)
Cost of sales	$	9.5	$	6.7	$	5.6
Research and development	29.5		22.1		16.7
Sales and marketing	21.5		16.2		13.0
General and administrative	62.1		38.0		39.7
Total stock-based compensation expense	$	122.6	$	83.0	$	75.0

Summary of Performance of Our Financial Results

	2021 Restricted Stock Units Outstanding
	Number of Units (1)	Weighted Average Grant-Date Fair Value per Share
(In millions, except for per share data)
Outstanding at the beginning of year	5.4	$	44.25
Granted (2)	1.2	78.44
Shares vested, net (2)	(1.9)	39.62
Canceled and forfeited	(0.4)	51.15
Outstanding at the end of year	4.3	$	56.96

(1) Includes 0.2 million PSUs granted, 0.4 million PSUs vested, and 1.1 million PSUs outstanding at the end of the year.

(2) Excludes approximately 0.1 million PSUs related to achievement above target levels at the vesting date.