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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 30, 2017 | Apr. 01, 2017 | Mar. 31, 2018 | Apr. 01, 2017
Tax Cuts and Jobs Act of 2017 [Line Items] |  |  |  |  |
Tax Reform Income Tax Expense |  | $ 124,500 |  |  |
Transition Tax for Accumulated Foreign Earnings |  | 101,800 |  |  |
Deferred Tax Liabilities, Undistributed Foreign Earnings |  | $ 22,700 |  |  |
Liabilities due to U.S. Tax Reform | $ 121,800 |  |  | $ 121,800 |
Income tax expense | $ 2,427 |  | $ 3,124 | $ 129,961 | $ 5,971
Effective income tax rate | 16.50% |  | 9.60% | 297.00% | 9.40%
One-time Employee Bonus Impact on Effective Income Tax Rate | $ 13,500 |  |  |  |
Long-term accrued income taxes payable |  |  |  |  |
Tax Cuts and Jobs Act of 2017 [Line Items] |  |  |  |  |
Tax Reform Income Tax Expense | 91,900 |  |  |  |
Deferred income tax liabilities |  |  |  |  |
Tax Cuts and Jobs Act of 2017 [Line Items] |  |  |  |  |
Tax Reform Income Tax Expense | 20,000 |  |  |  |
Other accrued liabilities |  |  |  |  |
Tax Cuts and Jobs Act of 2017 [Line Items] |  |  |  |  |
Tax Reform Income Tax Expense | $ 9,900 |  |  |  |

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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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