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Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2016 | Oct. 02, 2015 | Oct. 03, 2014 | Sep. 27, 2013
Income Taxes [Line Items] |  |  |  |
United States tax rate | 35.00% | 35.00% | 35.00% |
Foreign tax rate difference | $ (164.1) | $ (120.9) | $ (77.3) |
Federal research and development tax credit | 11.6 | 11.0 |  |
Adjustment to previous tax returns | 2.6 |  | 0.7 | $ 1.9
Decreases relating to settlements with taxing authorities | 22.6 |  | 20.9 |
Benefit to tax expense | $ 24.0 |  | 20.4 |
Tax benefits, reduction of foreign income tax expense |  |  | $ 4.6 |
Income tax holiday | Sep. 30, 2020 |  |  |
Impact of tax holiday | $ 30.8 | $ 26.6 |  |
Impact of tax holiday on diluted earnings per share (in dollars per share) | $ 0.16 | $ 0.14 |  |
Valuation Allowance, Amount | $ 79.1 | $ 65.2 |  |
Tax benefit to recognize if valuation allowance is reversed | 79.1 |  |  |
Future taxable income needed to utilize deferred tax assets | 137.5 |  |  |
Federal net operating loss carry forwards | $ 9.3 |  |  |
Operating loss carryforwards, expiration date | Dec. 31, 2035 |  |  |
Undistributed earnings of foreign subsidiaries | $ 1,676.8 |  |  |
Total unrecognized tax benefits that would impact the effective tax rate | 60.8 |  |  |
Previously unrecognized tax benefits related to the expiration of the statute of limitations | 0.6 |  |  |
Accrued interest or penalties related to unrecognized tax benefit | 1.9 |  |  |
Foreign Tax Authority [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Valuation Allowance, Amount | 15.1 |  |  |
State and Local Jurisdiction [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Valuation Allowance, Amount | 64.0 |  |  |
Tax credit carryforward | $ 64.0 |  |  |
UNITED STATES |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year | 1999 |  |  |
CALIFORNIA |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year | 1999 |  |  |
CANADA |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year | 2008 |  |  |
LUXEMBOURG |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year | 2011 |  |  |
MEXICO |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year | 2009 |  |  |
SINGAPORE |  |  |  |
Income Taxes [Line Items] |  |  |  |
Open tax year | 2011 |  |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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