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Stockholders' Equity (Tables) | 12 Months Ended
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Oct. 02, 2020
Stockholders' Equity Note [Abstract] |
Dividends Declared | The dividends charged to retained earnings in fiscal 2020 and 2019 were as follows (in millions except per share data):
| Fiscal Years Ended
| October 2, 2020 |  | September 27, 2019
| Per Share |  | Total |  | Per Share |  | Total
First quarter | $ | 0.44 |  |  | $ | 75.1 |  |  | $ | 0.38 |  |  | $ | 67.1 |
Second quarter | 0.44 |  |  | 74.9 |  |  | 0.38 |  |  | 66.0 |
Third quarter | 0.44 |  |  | 73.5 |  |  | 0.38 |  |  | 65.7 |
Fourth quarter | 0.50 |  |  | 83.5 |  |  | 0.44 |  |  | 75.1 |
| $ | 1.82 |  |  | $ | 307.0 |  |  | $ | 1.58 |  |  | $ | 273.9 |
Schedule of Share-based Compensation, Stock Options, Activity | The following table represents a summary of the Company’s stock options:
| Shares (in millions) |  | Weighted average exercise price |  | Weighted average remaining contractual life (in years) |  | Aggregate intrinsic value (in millions)
Balance outstanding at September 27, 2019 | 1.3 |  |  | $ | 65.38 |  |  |  |  |
Granted | — |  |  | $ | 98.72 |  |  |  |  |
Exercised | (0.9) |  |  | $ | 63.69 |  |  |  |  |
Canceled/forfeited | — |  |  | $ | 50.23 |  |  |  |  |
Balance outstanding at October 2, 2020 | 0.4 |  |  | $ | 70.28 |  |  | 2.2 |  | $ | 27.8 |
Exercisable at October 2, 2020 | 0.3 |  |  | $ | 70.10 |  |  | 1.9 |  | $ | 24.6 |
Schedule of Other Share-based Compensation, Activity | The following table represents a summary of the Company’s restricted and performance awards and units:
| Shares (in millions) |  | Weighted average grant date fair value
Non-vested awards outstanding at September 27, 2019 | 2.9 |  |  | $ | 89.14 |
Granted (1) | 1.4 |  |  | $ | 99.68 |
Vested | (1.0) |  |  | $ | 85.35 |
Canceled/forfeited | (0.4) |  |  | $ | 93.44 |
Non-vested awards outstanding at October 2, 2020 | 2.9 |  |  | $ | 94.77 |
(1) includes performance stock awards granted and earned assuming target performance under the underlying performance metrics
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following table summarizes pre-tax share-based compensation expense by financial statement line and related tax benefit (in millions):
| Fiscal Years Ended
| October 2, 2020 |  | September 27, 2019 |  | September 28, 2018
Cost of goods sold | $ | 23.2 |  |  | $ | 13.0 |  |  | $ | 14.4 |
Research and development | 68.7 |  |  | 41.6 |  |  | 42.6 |
Selling, general and administrative | 64.7 |  |  | 25.5 |  |  | 50.8 |
Total share-based compensation expense | $ | 156.6 |  |  | $ | 80.1 |  |  | $ | 107.8 |
Share-based compensation tax benefit | $ | 10.3 |  |  | $ | 1.6 |  |  | $ | 25.6 |
Capitalized share-based compensation expense at period end | $ | 10.6 |  |  | $ | 4.7 |  |  | $ | 2.9 |
Schedule of Unrecognized Compensation Cost, Nonvested Awards | The following table summarizes total compensation costs related to unvested share-based awards not yet recognized and the weighted average period over which it is expected to be recognized at October 2, 2020:
| Unrecognized compensation cost for unvested awards (in millions) |  | Weighted average remaining recognition period (in years)
Awards | $ | 170.7 |  |  | 1.6
Options | $ | 0.3 |  |  | 0.5
Schedule of Share-based Payment Awards, Performance Shares, Valuation Assumptions Used | he fair value of these performance stock unit awards was estimated on the date of the grant using a Monte Carlo simulation with the following weighted average assumptions:
| Fiscal Year Ended
| October 2, 2020 |  | September 27, 2019 |  | September 28, 2018
Volatility of common stock | 32.22 | % |  | 32.65 | % |  | 35.54 | %
Average volatility of peer companies | 33.96 | % |  | 37.07 | % |  | 36.78 | %
Average correlation coefficient of peer companies | 0.61 |  |  | 0.47 |  |  | 0.47
Risk-free interest rate | 1.62 | % |  | 2.98 | % |  | 1.74 | %
Dividend yield | 1.78 | % |  | 1.84 | % |  | 1.15 | %
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The fair value of each stock option is estimated on the date of the grant using the Black-Scholes option pricing model with the following weighted average assumptions:
| Fiscal Years Ended
| October 2, 2020 |  | September 27, 2019 |  | September 28, 2018
Expected volatility | 34.26 | % |  | 34.47 | % |  | 35.86 | %
Risk-free interest rate | 1.65 | % |  | 2.76 | % |  | 2.00 | %
Dividend yield | 1.78 | % |  | 1.84 | % |  | 1.15 | %
Expected option life (in years) | 4.0 |  | 4.0 |  | 4.0

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