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Stockholders' Equity (Employee Stock Benefit Plans) (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Sep. 30, 2022
Oct. 01, 2021
Oct. 02, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized (in shares) 81.8    
Shares available for grant (in shares) 14.1    
Employee Contributions To ESPP 10.00%    
Capitalized stock based compensation $ 6.8 $ 9.8 $ 10.6
Share-based compensation $ 195.2 $ 191.9 $ 156.6
Director Long Term Incentive Plan 2008 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized (in shares) 1.5    
Shares available for grant (in shares) 0.6    
Stock Compensation Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized (in shares) 24.5    
Options outstanding (in shares) 0.1    
Shares available for grant (in shares) 12.1    
Equity incentive plan performance shares maximum vesting period 3 years    
Employee Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized (in shares) 11.6    
ESPP shares issued (in shares) 0.3 0.2 0.3
Shares available for grant (in shares) 1.4    
Percent of market price 85.00%    
Share-based compensation $ 9.2 $ 8.7 $ 6.6
Unrecognized Compensation Cost for unvested awards $ 3.4    
Weighted average remaining recognition period (in years) 4 months    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized Compensation Cost for unvested awards $ 208.2    
Weighted average remaining recognition period (in years) 2 years 7 months 6 days    
Restricted Stock [Member] | Director Long Term Incentive Plan 2008 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Restricted Stock [Member] | Long Term Incentive Plan 2015 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Stock Options [Member] | Director Long Term Incentive Plan 2008 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Contractual life maximum 10 years    
Vesting period 4 years    
Stock Options [Member] | Long Term Incentive Plan 2015 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Contractual life maximum 7 years    
Vesting period 4 years    
Performance Shares [Member] | Long Term Incentive Plan 2015 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year