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Restructuring and Other Charges - Summary of Restructuring by Major Type of Restructuring Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 29, 2017 | Sep. 30, 2016 | Oct. 02, 2015
Restructuring Charges [Line Items] |  |  |
Restructuring costs | $ 98,688 | $ 187,907 | $ 157,192
Lease Abandonments |  |  |
Restructuring Charges [Line Items] |  |  |
Restructuring costs | 55,647 | 92,643 | 90,569
Involuntary Terminations |  |  |
Restructuring Charges [Line Items] |  |  |
Restructuring costs | 30,716 | 85,599 | 55,313
Outside Services |  |  |
Restructuring Charges [Line Items] |  |  |
Restructuring costs | 4,236 | 7,398 | 12,734
Other Restructuring Related Costs, Net |  |  |
Restructuring Charges [Line Items] |  |  |
Restructuring costs | $ 8,089 | $ 2,267 | $ (1,424)

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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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