Commitments and Contingencies (Schedule of Minimum Lease Payments for Non-cancelable Leases) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 26, 2014
Operating Leases
Operating leases, fiscal 2015	$ 21.5
Operating leases, fiscal 2016	16.6
Operating leases, fiscal 2017	13.9
Operating leases, fiscal 2018	9.8
Operating leases, fiscal 2019	8.2
Operating leases, thereafter	25.0
Operating leases, total minimum lease payments	95.0
Capital Leases
Capital leases, fiscal 2015	1.4
Capital leases, fiscal 2016	0.4
Capital leases, fiscal 2017	0
Capital leases, fiscal 2018	0
Capital leases, fiscal 2019	0
Capital leases, thereafter	0
Capital leases, total minimum lease payments	1.8
Capital leases, interest portion of total minimum lease payments	0
Capital leases, present value of minimum lease payments	1.8
Plant assets exchanged for IRBs	$ 27.4