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Stock-Based Compensation (Tables) | 9 Months Ended
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Jun. 25, 2022
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 |  | Nine Months Ended
| June 25, 2022 |  | June 26, 2021 |  | June 25, 2022 |  | June 26, 2021
Cost of revenues | $ | 2.2 |  |  | $ | 1.9 |  |  | $ | 7.1 |  |  | $ | 6.4 |
Research and development | 1.8 |  |  | 1.4 |  |  | 7.3 |  |  | 6.2 |
Selling and marketing | 2.6 |  |  | 2.3 |  |  | 8.0 |  |  | 7.7 |
General and administrative | 8.7 |  |  | 8.9 |  |  | 29.4 |  |  | 29.8 |
Restructuring | — |  |  | 0.9 |  |  | — |  |  | 0.9 |
| $ | 15.3 |  |  | $ | 15.4 |  |  | $ | 51.8 |  |  | $ | 51.0 |
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 |  | Nine Months Ended
| June 25, 2022 |  | June 26, 2021 |  | June 25, 2022 |  | June 26, 2021
Risk-free interest rate | 1.1 | % |  | 0.4 | % |  | 1.1 | % |  | 0.4 | %
Expected volatility | 34.2 | % |  | 35.0 | % |  | 34.2 | % |  | 35.0 | %
Expected life (in years) | 4.8 |  | 4.8 |  | 4.8 |  | 4.8
Dividend yield | — |  |  | — |  |  | — |  |  | — |
Weighted average fair value of options granted | $ | 21.48 |  |  | $ | 19.17 |  |  | $ | 21.03 |  |  | $ | 20.07 |

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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 + Details
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