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Revenue Accounting for Contracts - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 27, 2019 | Dec. 28, 2018
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 3,360,049 | $ 3,083,788
United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2,532,705 | 2,182,304
Europe |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 551,272 | 614,224
Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 55,396 | 50,488
Asia |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 30,440 | 35,611
India |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 5,980 | 12,639
Australia and New Zealand |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 129,194 | 126,647
South America and Mexico |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 11 | 2,649
Middle East and Africa |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 55,051 | $ 59,226

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 + Details
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