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Commitments and Contingencies (Details)
6 Months Ended
Mar. 29, 2019
USD ($)
Loss Contingencies [Line Items]  
Maximum potential liability from vehicle leases $ 34,300,000
Residual value guarantee, value assumptions, terminal fair value of vehicles coming off lease 0
Residual value guarantee accrual $ 0
Minimum  
Loss Contingencies [Line Items]  
Operating lease terms 1 year
Maximum  
Loss Contingencies [Line Items]  
Operating lease terms 8 years