Segment Information - Concentration Risk (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended		0 Months Ended			3 Months Ended		6 Months Ended
	Dec. 30, 2011 Product revenue Customer concentration risk	Dec. 28, 2012 Product revenue Customer concentration risk U.S. Government	Dec. 30, 2011 Product revenue Customer concentration risk U.S. Government	Dec. 28, 2012 Product revenue Customer concentration risk U.S. Government	Dec. 28, 2012 Americas Product revenue Customer concentration risk customers	Dec. 30, 2011 Americas Product revenue Customer concentration risk customers	Dec. 28, 2012 Americas Product revenue Customer concentration risk customers	Dec. 30, 2011 Americas Product revenue Customer concentration risk customers	Dec. 28, 2012 Americas Accounts receivable Customer concentration risk customers	Jun. 29, 2012 Americas Accounts receivable Customer concentration risk customers	Jun. 29, 2012 Americas Accounts receivable Customer concentration risk Customer 1	Dec. 28, 2012 Japan Revenue Geographic concentration risk	Dec. 30, 2011 Japan Revenue Geographic concentration risk	Dec. 28, 2012 Japan Revenue Geographic concentration risk	Dec. 30, 2011 Japan Revenue Geographic concentration risk
Concentration risk:
Number of customers meeting concentration risk benchmark					1	1	1	1	1	1
Concentration risk percentage	15.00%	11.00%	10.00%	13.00%	19.00%	12.00%	18.00%		15.00%		28.00%	11.00%	21.00%	15.00%	20.00%
International sales to single foreign countries												$ 18.6	$ 41.9	$ 55.0	$ 75.2