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Income Taxes - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 29, 2018 | Dec. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017 | Oct. 01, 2016
Income tax expense |  |  | $ 94,570 | $ 9,761 | $ 10,967
Tax Reform Income Tax Expense (Benefit) | $ (38,600) | $ 124,500 | 85,900 |  |
Tax Cuts and Jobs Act of 2017, Tax on Deemed Repatriation of Foreign Earnings |  |  | 61,200 |  |
Deferred Tax Liabilities, Undistributed Foreign Earnings | 21,800 |  | 21,800 |  |
Other Tax Expense (Benefit) | 1,100 |  | (2,900) |  |
Additions (reductions) to valuation allowance | 3,600 |  | (32,900) | 14,900 |
Foreign earnings repatriated |  |  |  |  | 100,000
Increase (Decrease) to valuation allowance |  |  | (33,300) |  |
Uncertain tax benefits | 5,800 |  | 5,800 |  |
Unrecognized tax benefits that would reduce company's effective tax rate if recognized | 4,600 |  | 4,600 | 800 |
Total accrued penalties and net accrued interest with respect to income taxes | 200 |  | 200 | 200 | 200
Expense recognized for accrued penalties and net accrued interest (less than) |  |  | 100 | 100 | 100
Other liabilities (noncurrent) |  |  |  |  |
Uncertain tax benefits | 4,600 |  | 4,600 |  |
Deferred income taxes (noncurrent asset) |  |  |  |  |
Uncertain tax benefits | 1,200 |  | 1,200 |  |
Foreign Tax Authority |  |  |  |  |
Net operating loss carryforwards | 80,500 |  | 80,500 |  |
State Jurisdiction |  |  |  |  |
Net operating loss carryforwards | $ 174,700 |  | 174,700 |  |
AMER |  |  |  |  |
Increase (Decrease) to valuation allowance |  |  | (34,400) |  |
EMEA |  |  |  |  |
Additions (reductions) to valuation allowance |  |  | 1,400 |  |
Increase (Decrease) to valuation allowance |  |  | 1,100 |  |
APAC |  |  |  |  |
Tax reductions related to tax holiday |  |  | $ 39,100 | $ 37,500 | $ 27,100
Tax reductions related to tax holiday, basic (in dollars per share) |  |  | $ 1.19 | $ 1.11 | $ 0.81
Tax reductions related to tax holiday, diluted (in dollars per share) |  |  | $ 1.15 | $ 1.08 | $ 0.79
Tax Cuts and Jobs Act of 2017 [Member] |  |  |  |  |
Additions (reductions) to valuation allowance |  |  | $ (9,700) |  |
Valuation Allowance, Operating Loss Carryforwards [Member] |  |  |  |  |
Additions (reductions) to valuation allowance |  |  | (21,000) |  |
Global intangible low-taxed income [Member] |  |  |  |  |
Additions (reductions) to valuation allowance |  |  | $ (3,600) |  |

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- Definition Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=96869850&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 + Details
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