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Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Oct. 02, 2020 | Sep. 27, 2019 | Sep. 28, 2018
Income Taxes [Line Items] |  |  |
United States tax rate | 21.00% | 21.00% | 24.60%
Foreign tax rate difference | $ (86,600) | $ (115,300) | $ (111,900)
Income tax holiday | September 30, 2030 |  |
Impact of tax holiday | $ 63,100 | $ 32,800 | $ 38,400
Impact of tax holiday on diluted earnings per share (in dollars per share) | $ 0.37 | $ 0.19 | $ 0.21
Valuation Allowance, Amount | $ 137,400 | $ 129,100 |
Tax benefit to recognize if valuation allowance is reversed | 137,400 |  |
Future taxable income needed to utilize deferred tax assets | 124,100 |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 8,300 | 10,500 |
Total unrecognized tax benefits that would impact the effective tax rate | 95,300 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | 4,600 | 6,000 | $ 4,100
Previously unrecognized tax benefits related to the expiration of the statute of limitations | 100 |  |
Decreases relating to settlements with taxing authorities | 0 |  |
Accrued interest or penalties related to unrecognized tax benefit | 16,100 | 12,700 |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount | 200 | 8,100 | 224,600
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | 0 | 0 | 18,300
EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeAmount | 35,900 | 54,300 | 0
EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncome | (41,200) | (41,500) | $ 0
Income Tax Examination, Penalties and Interest Accrued | 3,800 |  |
Foreign Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Valuation Allowance, Amount | 18,600 |  |
State and Local Jurisdiction [Member] |  |  |
Income Taxes [Line Items] |  |  |
Valuation Allowance, Amount | 118,800 |  |
Tax credit carryforward | 115,400 |  |
UNITED STATES |  |  |
Income Taxes [Line Items] |  |  |
Federal net operating loss carry forwards | $ 8,100 |  |
Open tax year | 2001 |  |
CALIFORNIA |  |  |
Income Taxes [Line Items] |  |  |
Open tax year | 1999 |  |
CANADA |  |  |
Income Taxes [Line Items] |  |  |
Open tax year | 2013 |  |
MEXICO |  |  |
Income Taxes [Line Items] |  |  |
Open tax year | 2014 |  |
JAPAN |  |  |
Income Taxes [Line Items] |  |  |
Open tax year | 2014 |  |
SINGAPORE |  |  |
Income Taxes [Line Items] |  |  |
Open tax year | 2014 |  |
Other Current Liabilities [Member] |  |  |
Income Taxes [Line Items] |  |  |
Foreign Earnings Repatriated | $ 18,600 | 18,800 |
Other Noncurrent Liabilities [Member] |  |  |
Income Taxes [Line Items] |  |  |
Foreign Earnings Repatriated | $ 177,000 | $ 195,900 |

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