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Summary of Refranchisings and Franchise Acquisitions (Number of Restaurants Sold to Franchisees and Developed by Franchisees and Gains Recognized) (Details) - restaurant | 12 Months Ended
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Oct. 03, 2021 | Sep. 27, 2020 | Sep. 29, 2019
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items] |  |  |
Company-owned restaurants sold to franchisees | 0 | 0 | 0
Number of restaurants acquired from franchisees | 20 | 8 | 0
Number of franchises acquired through agreement with underperforming franchisee | 16 |  |
Number of franchises acquired through exercise of first right of refusal | 4 |  |

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- Definition Significant Changes, Franchises Purchased During Period, Exercise of First Right of Refusal + References No definition available. + Details
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- Definition Significant Changes, Franchises Purchased During Period From Underperforming Franchisee + References No definition available. + Details
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- Definition The number of franchises purchased during the period when there are significant changes in franchisor-owned outlets or franchised outlets during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 952 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109207840&loc=SL51750552-203207 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 952 -SubTopic 605 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68064525&loc=d3e68639-108044 + Details
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- Definition The number of franchises sold during the period when there are significant changes in franchisor-owned outlets or franchised outlets during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 952 -SubTopic 605 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68064525&loc=d3e68639-108044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 952 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109207840&loc=SL51750552-203207 + Details
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