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Stock-Based Compensation (Tables)

6 Months Ended

Mar. 27, 2021

Share-based Payment Arrangement [Abstract]

Stock-Based Compensation Expense in Consolidated Statements of Operations

The following presents stock-based compensation expense in the Company’s Consolidated Statements of Income:

			Three Months Ended												Six Months Ended
			March 27, 2021						March 28, 2020						March 27, 2021						March 28, 2020
Cost of revenues			$	2.3					$	1.7					$	4.5					$	3.8
Research and development			2.3						2.3						4.8						4.6
Selling and marketing			2.7						2.8						5.4						5.6
General and administrative			9.7						6.5						20.9						17.4
Restructuring			—						2.4						—						2.4
			$	17.0					$	15.7					$	35.6					$	33.8

Weighted-Average Assumptions Utilized to Value Stock Options

The Company uses a binomial model to determine the fair value of its stock options. The weighted-average assumptions utilized to value these stock options are indicated in the following table:

			Three Months Ended												Six Months Ended
			March 27, 2021						March 28, 2020						March 27, 2021						March 28, 2020
Risk-free interest rate			0.4		%				1.7		%				0.4		%				1.7		%
Expected volatility			35.0		%				33.6		%				35.0		%				33.6		%
Expected life (in years)			4.8						4.8						4.8						4.8
Dividend yield			—						—						—						—
Weighted average fair value of options granted			$	21.17					$	14.45					$	20.08					$	13.87

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Schedule of share-based compensation expense.

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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