Employee Retirement Plans (Details 2) (Supplemental Employee Retirement Plan [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans
Plan assets	$ 0
Projected benefit obligation classified in other long-term liabilities	1.4	1.4
Net periodic pension expense (income)	$ 0.2	$ 0.3	$ (0.1)