Fair Value Fair Value, Assets Measured on Recurring Basis, Using Unobservable Inputs (Details) (Fair Value, Inputs, Level 3 [Member], Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2013
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at September 28, 2012	$ 3.1
Sale of auction rate security	(0.8)
Balance at September 27, 2013	$ 2.3