Investments, At Cost (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 25, 2011 Privately held domestic company - common and preferred stock [Member]	Jun. 30, 2013 Privately held domestic company - note receivable [Member]	Dec. 23, 2012 Privately held domestic company - note receivable [Member]
Schedule of Cost-method Investments [Line Items]
Strategic investments, at cost	$ 1.5		$ 0.4
Other-than-temporary impairments	$ 1.5	$ 0.4