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Summary of Significant Accounting Policies - Schedule of Derivative Instruments on the Consolidated Balance Sheets (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net $ (5.7) $ 0.8
Interest rate caps - derivative    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cash Flow Hedge Derivative Instrument Assets at Fair Value 7.7 4.8
Interest rate caps - derivative | Prepaid Expenses and Other Current Assets [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cash Flow Hedge Derivative Instrument Assets at Fair Value 6.0 3.6
Interest rate caps - derivative | Other Assets [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cash Flow Hedge Derivative Instrument Assets at Fair Value 1.7 1.2
Forward foreign currency contracts | Prepaid Expenses and Other Current Assets [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cash Flow Hedge Derivative Instrument Assets at Fair Value 3.2 0.4
Forward foreign currency contracts | Accrued Liabilities [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cash Flow Hedge Derivative Instrument Assets at Fair Value $ 0.2 $ 4.0