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Severance - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Jun. 30, 2023
Jun. 28, 2024
Restructuring Cost and Reserve [Line Items]    
Severance costs $ 29.7  
Employee Severance and Other Costs    
Restructuring Cost and Reserve [Line Items]    
Severance and related costs accrual   $ 6.0