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Stockholders' Equity (Tables) | 12 Months Ended
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Sep. 27, 2019
Stockholders' Equity Note [Abstract] |
Dividends Declared | The dividends charged to retained earnings in fiscal 2019 and 2018 were as follows (in millions except per share amounts):
| Fiscal Years Ended
| September 27, 2019 |  | September 28, 2018
| Per Share |  | Total |  | Per Share |  | Total
First quarter | $ | 0.38 |  |  | $ | 67.1 |  |  | $ | 0.32 |  |  | $ | 58.8 |
Second quarter | 0.38 |  |  | 66.0 |  |  | 0.32 |  |  | 58.5 |
Third quarter | 0.38 |  |  | 65.7 |  |  | 0.32 |  |  | 57.8 |
Fourth quarter | 0.44 |  |  | 75.1 |  |  | 0.38 |  |  | 68.1 |
| $ | 1.58 |  |  | $ | 273.9 |  |  | $ | 1.34 |  |  | $ | 243.2 |
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 28, 2018 | 1.9 |  |  | $ | 57.12 |  |  |  |  |
Granted | — |  |  | $ | 82.64 |  |  |  |  |
Exercised | (0.6 | ) |  | $ | 37.31 |  |  |  |  |
Canceled/forfeited | — |  |  | $ | 82.46 |  |  |  |  |
Balance outstanding at September 27, 2019 | 1.3 |  |  | $ | 65.38 |  |  | 2.6 |  | $ | 19.5 |
Exercisable at September 27, 2019 | 1.0 |  |  | $ | 63.46 |  |  | 2.2 |  | $ | 17.5 |
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 28, 2018 | 2.7 |  |  | $ | 92.37 |
Granted (1) | 1.5 |  |  | $ | 78.41 |
Vested | (0.8 | ) |  | $ | 85.95 |
Canceled/forfeited | (0.5 | ) |  | $ | 91.24 |
Non-vested awards outstanding at September 27, 2019 | 2.9 |  |  | $ | 87.22 |
(1) includes performance shares granted and earned assuming maximum performance under the underlying performance metrics
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value |
| Fiscal Years Ended
| September 27, 2019 |  | September 28, 2018 |  | September 29, 2017
Awards | $ | 67.7 |  |  | $ | 134.4 |  |  | $ | 137.8 |
Options | $ | 26.4 |  |  | $ | 75.0 |  |  | $ | 116.1 |
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
| September 27, 2019 |  | September 28, 2018 |  | September 29, 2017
Cost of goods sold | $ | 13.0 |  |  | $ | 14.4 |  |  | $ | 13.6 |
Research and development | 41.6 |  |  | 42.6 |  |  | 35.3 |
Selling, general and administrative | 25.5 |  |  | 50.8 |  |  | 39.6 |
Total share-based compensation expense | $ | 80.1 |  |  | $ | 107.8 |  |  | $ | 88.5 |
Share-based compensation tax benefit | $ | 1.6 |  |  | $ | 25.6 |  |  | $ | 25.1 |
Capitalized share-based compensation expense at period end | $ | 4.7 |  |  | $ | 2.9 |  |  | $ | 4.0 |
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 September 27, 2019:
| Unrecognized compensation cost for unvested awards (in millions) |  | Weighted average remaining recognition period (in years)
Awards | $ | 129.6 |  |  | 1.7
Options | $ | 2.6 |  |  | 0.7
Schedule of Share-based Payment Awards, Performance Shares, Valuation Assumptions Used | The fair value of these performance share units was estimated on the date of the grant using a Monte Carlo simulation with the following weighted average assumptions:
| Fiscal Year Ended
| September 27, 2019 |  | September 28, 2018 |  | September 29, 2017
Volatility of common stock | 32.65 | % |  | 35.54 | % |  | 39.60 | %
Average volatility of peer companies | 37.07 | % |  | 36.78 | % |  | 39.78 | %
Average correlation coefficient of peer companies | 0.47 |  |  | 0.47 |  |  | 0.42 |
Risk-free interest rate | 2.98 | % |  | 1.74 | % |  | 0.68 | %
Dividend yield | 1.84 | % |  | 1.15 | % |  | 1.44 | %
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
| September 27, 2019 |  | September 28, 2018 |  | September 29, 2017
Expected volatility | 34.47 | % |  | 35.86 | % |  | 40.31 | %
Risk-free interest rate | 2.76 | % |  | 2.00 | % |  | 1.60 | %
Dividend yield | 1.84 | % |  | 1.15 | % |  | 1.44 | %
Expected option life (in years) | 4.0 |  |  | 4.0 |  |  | 4.0 |

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