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Discontinued Operations - Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Apr. 14, 2019
USD ($)
Apr. 15, 2018
USD ($)
Apr. 14, 2019
USD ($)
extnsion_option
Apr. 15, 2018
USD ($)
Sep. 30, 2018
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Discontinued Operation, Period of Continuing Involvement after Disposal     12 months    
Discontinued Operation, Period Of Continuing Involvement After Disposal, Number Of Extension Options | extnsion_option     2    
Discontinued Operation, Period Of Continuing Involvement After Disposal, Service Period Extension Option     3 months    
Other Nonrecurring Income $ 1.9 $ 1.1 $ 5.6 $ 1.1  
Other Nonrecurring Expense     35.4    
Disposal Group, Including Discontinued Operation, Accrued Income Tax Payable 2.8   2.8    
Lease Guarantee $ 35.3   $ 35.3    
Term Loan [Member] | Qdoba          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Repayments of Debt         $ 260.0