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Financial Instruments and Risk Management - Reconciliation of the Beginning and Ending Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - Fair value input Level 3 - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2023
Sep. 24, 2022
Reconciliation of beginning and ending balances of assets measured at fair value on recurring basis using significant unobservable inputs [Rollforward]    
Beginning balance of over-the-counter options $ 222 $ 4,626
Beginning balance realized during the period (194) (4,626)
Contracts purchased during the period 0 222
Change in the fair value of outstanding contracts (28) 0
Ending balance of over-the-counter options 0 222
Reconciliation of beginning and ending balances of liabilities measured at fair value on recurring basis using significant unobservable inputs [Rollforward]    
Beginning balance of over-the-counter options 3,408 451
Beginning balance realized during the period (2,475) (219)
Contracts purchased during the period 0 3,295
Change in the fair value of outstanding contracts (127) (119)
Ending balance of over-the-counter options $ 806 $ 3,408