Derivatives Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 25, 2016	Jun. 27, 2015	Jun. 25, 2016	Jun. 27, 2015	Sep. 26, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest Rate Cap Agreements Aggregate Premium Payable			$ 0.0	$ 6.1	$ 13.2
Principal Amount Of Borrowings	$ 1,000.0		1,000.0
Interest Payment Duration	three-year
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	$ 1.2	$ 0.0	2.2	$ 0.0
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			6.6
Interest Rate Cash Flow Hedge Asset at Fair Value					$ 6.9
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax	0.2		0.6
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	0.2		0.8
Notional Amount	$ 35.0		$ 35.0