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Stockholders' Equity (Employee Stock Benefit Plans) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended
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Oct. 01, 2021 | Oct. 02, 2020 | Sep. 27, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares authorized (in shares) | 81,800 |  |
Options outstanding (in shares) | 200 | 400 |
Shares available for grant (in shares) | 16,300 |  |
Employee Contributions To ESPP | 10.00% |  |
Weighted average grant fair value, grants in period | $ 39.63 | $ 24.49 | $ 21.74
Capitalized stock based compensation | $ 9.8 | $ 10.6 | $ 4.7
Share-based compensation | $ 191.9 | $ 156.6 | $ 80.1
Director Long Term Incentive Plan 2008 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares authorized (in shares) | 1,500 |  |
Shares available for grant (in shares) | 600 |  |
Stock Compensation Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares authorized (in shares) | 24,500 |  |
Options outstanding (in shares) | 200 |  |
Shares available for grant (in shares) | 14,000 |  |
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) | 11,600 |  |
ESPP shares issued (in shares) | 200 | 300 | 300
Shares available for grant (in shares) | 1,600 |  |
Percent of market price | 85.00% |  |
Share-based compensation | $ 8.7 | $ 6.6 | $ 5.8
Unrecognized Compensation Cost for unvested awards | $ 3.1 |  |
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 | $ 202.0 |  |
Weighted average remaining recognition period (in years) | 2 years 10 months 24 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] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized Compensation Cost for unvested awards | $ 0.1 |  |
Weighted average remaining recognition period (in years) | 1 year 3 months 18 days |  |
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 |  |

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