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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. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017 | Sep. 26, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Purchase of interest rate caps | $ 1.5 | $ 3.7 | $ 1.9 | $ 13.2
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | (8.0) | (5.7) |  |
Cash Flow Hedge Derivative Instrument Assets at Fair Value | 4.8 | 7.7 |  |
Prepaid Expenses and Other Current Assets [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Cash Flow Hedge Derivative Instrument Assets at Fair Value | 2.9 | 3.2 |  |
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 | 0.1 | 6.0 |  |
Interest rate caps - derivative | Other Assets [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Cash Flow Hedge Derivative Instrument Assets at Fair Value | 0.0 | 1.7 |  |
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 | 0.9 | 3.2 |  |
Forward foreign currency contracts | Accrued Liabilities [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Cash Flow Hedge Derivative Instrument Assets at Fair Value | 0.1 | 0.2 |  |
Foreign Exchange Option [Member] | Prepaid Expenses and Other Current Assets [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Cash Flow Hedge Derivative Instrument Assets at Fair Value | 2.0 | 0.0 |  |
Interest Rate Swap [Member] | Other Assets [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Cash Flow Hedge Derivative Instrument Assets at Fair Value | 4.7 | 0.0 |  |
Interest Rate Swap [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Interest rate caps - derivative | 4.7 |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | $ 3.5 | $ 0.0 | $ 0.0 |

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