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Stockholders' Equity (Tables) | 12 Months Ended
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Oct. 02, 2015
Stockholders' Equity Note [Abstract] |
Dividends Declared | The dividends charged to retained earnings in fiscal 2015 and 2014 were as follows (in millions except per share amounts):
| Fiscal Years Ended
| October 2, 2015 |  | October 3, 2014
| Per Share |  | Total |  | Per Share |  | Total
First quarter | $ | 0.13 |  |  | $ | 24.7 |  |  | $ | — |  |  | $ | — |
Second quarter | 0.13 |  |  | 24.9 |  |  | — |  |  | — |
Third quarter | 0.13 |  |  | 24.8 |  |  | 0.11 |  |  | 20.8 |
Fourth quarter | 0.26 |  |  | 49.6 |  |  | 0.11 |  |  | 20.9 |
| $ | 0.65 |  |  | $ | 124.0 |  |  | $ | 0.22 |  |  | $ | 41.7 |
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 October 3, 2014 | 7.5 |  |  | $ | 21.26 |  |  |  |  |
Granted | 1.1 |  |  | $ | 63.62 |  |  |  |  |
Exercised | (2.9 | ) |  | $ | 19.78 |  |  |  |  |
Canceled/forfeited | (0.3 | ) |  | $ | 30.12 |  |  |  |  |
Balance outstanding at October 2, 2015 | 5.4 |  |  | $ | 29.99 |  |  | 4.2 |  | $ | 291.3 |
Exercisable at October 2, 2015 | 2.1 |  |  | $ | 18.63 |  |  | 2.7 |  | $ | 134.2 |
Schedule of Other Share-based Compensation, Activity | The following table represents a summary of the Company’s restricted and performance transactions:
| Shares (In millions) |  | Weighted average grant date fair value
Non-vested awards outstanding at October 3, 2014 | 5.7 |  |  | $ | 21.48 |
Granted (1) | 1.8 |  |  | $ | 63.56 |
Vested | (2.4 | ) |  | $ | 25.44 |
Canceled/forfeited | (0.3 | ) |  | $ | 24.42 |
Non-vested awards outstanding at October 2, 2015 | 4.8 |  |  | $ | 23.20 |
(1) includes performance shares granted and earned based on 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 | The following table summarizes the total intrinsic value for stock options exercised and awards vested (in millions):
| Fiscal Years Ended
| October 2, 2015 |  | October 3, 2014 |  | September 27, 2013
Options | $ | 170.8 |  |  | $ | 101.3 |  |  | $ | 26.2 |
Awards | $ | 149.0 |  |  | $ | 63.1 |  |  | $ | 53.5 |
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, 2015 |  | October 3, 2014 |  | September 27, 2013
Cost of goods sold | $ | 14.5 |  |  | $ | 11.3 |  |  | $ | 10.2 |
Research and development | 45.4 |  |  | 36.2 |  |  | 28.2 |
Selling, general and administrative | 39.9 |  |  | 38.5 |  |  | 33.3 |
Total share-based compensation expense | $ | 99.8 |  |  | $ | 86.0 |  |  | $ | 71.7 |
Share-based compensation tax benefit | $ | 29.3 |  |  | $ | 25.6 |  |  | $ | 21.4 |
Capitalized share-based compensation expense | $ | 2.3 |  |  | $ | 1.7 |  |  | $ | 2.1 |
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, 2015:
| Unrecognized compensation cost for unvested awards (in millions) |  | Weighted average remaining recognition period (in years)
Options | $ | 31.9 |  |  | 2.0
Awards | $ | 69.5 |  |  | 1.1
Schedule of Share-based Payment Awards, Performance Shares, Valuation Assumptions Used | The fair value of these performance share units were estimated on the date of the grant using a Monte Carlo simulation with the following weighted average assumptions:
| Fiscal Year Ended
| October 2, 2015 |  | October 3, 2014
Volatility of common stock | 37.51 | % |  | 36.96 | %
Average volatility of peer companies | 28.42 | % |  | 29.59 | %
Average correlation coefficient of peer companies | 0.55 |  |  | 0.47 |
Risk-free interest rate | 0.12 | % |  | 0.11 | %
Dividend yield | 0.85 |  |  | — |
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, 2015 |  | October 3, 2014 |  | September 27, 2013
Expected volatility | 45.75 | % |  | 47.40 | % |  | 57.71 | %
Risk-free interest rate | 1.33 | % |  | 1.83 | % |  | 1.29 | %
Dividend yield | 1.16 |  |  | 0.83 |  |  | — |
Expected option life (in years) | 4.5 |  |  | 4.6 |  |  | 4.2 |

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