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Stockholders' Equity (Tables)
 12 Months Ended
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 ShareTotalPer ShareTotal
First quarter$0.44 $75.1 $0.38 $67.1 
Second quarter0.44 74.9 0.38 66.0 
Third quarter0.44 73.5 0.38 65.7 
Fourth quarter0.50 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, 20192.9 $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, 20202.9 $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 development68.7 41.6 42.6 
Selling, general and administrative64.7 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 stock32.22 %32.65 %35.54 %
Average volatility of peer companies33.96 %37.07 %36.78 %
Average correlation coefficient of peer companies0.61 0.47 0.47
Risk-free interest rate1.62 %2.98 %1.74 %
Dividend yield1.78 %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 volatility34.26 %34.47 %35.86 %
Risk-free interest rate1.65 %2.76 %2.00 %
Dividend yield1.78 %1.84 %1.15 %
Expected option life (in years)4.04.04.0