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Severance - Severance Charges by Segment (Details) - Cost of Services Provided (Exclusive of Depreciation and Amortization) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 29, 2024
Mar. 29, 2024
Restructuring Cost and Reserve [Line Items]    
Severance costs $ 29.7 $ 29.7
Corporate    
Restructuring Cost and Reserve [Line Items]    
Severance costs 0.6 0.6
FSS - United States | Operating Segments    
Restructuring Cost and Reserve [Line Items]    
Severance costs 3.3 3.3
FSS International | Operating Segments    
Restructuring Cost and Reserve [Line Items]    
Severance costs $ 25.8 $ 25.8