Balance Sheet Accounts (Narratives) (Details) (USD $)	3 Months Ended			3 Months Ended									0 Months Ended
	Sep. 30, 2012 Investment_Securities	Oct. 02, 2011	Jun. 30, 2012	Sep. 30, 2012 Par Value	Sep. 30, 2012 Additional Paid-in Capital	Sep. 30, 2012 Minimum	Sep. 30, 2012 Maximum	Sep. 30, 2012 Cash Equivalents Maximum	Sep. 30, 2012 Short-term Investments Minimum	Sep. 30, 2012 Short-term Investments Maximum	Sep. 30, 2012 Marketable Securities Minimum	Sep. 30, 2012 Available-for-sale Securities Government and Corporate Debt Securities	Sep. 11, 2012 Santa Clara Headquarters acre	Sep. 30, 2012 Santa Clara Headquarters	Sep. 12, 2012 Santa Clara Headquarters building	Sep. 12, 2012 August 31, 2014 Santa Clara Headquarters building	Sep. 12, 2012 January 31, 2013 Santa Clara Headquarters building
Balance Sheet Accounts [Line Items]
Maturity period for investments								3 months	3 months	1 year	1 year	3 years
Number of securities with unrealized losses	3
Number of investment securities	63
Number of acres of land sold													16
Net cash proceeds from sale of real estate	$ 42,659,000	$ 0											$ 44,700,000
Number of buildings in sale-leaseback agreement															3	2	1
Number of sold buildings on property															4
Number of days of notice to terminate agreement													30 days
Future minimum rent payments for remainder of fiscal year 2013														1,100,000
Future minimum rent payments for fiscal year 2014														5,500,000
Future minimum rent payments for fiscal year 2015														1,000,000
Gain on sale of property	11,537,000	0											11,700,000
Deferred gain on sale of property														100,000
Amortization expense	438,000	519,000
Extended warranty contracts period						1 year	5 years
Standard hardware warranty period	12 months
Standard software warranty period	90 days
Limited lifetime hardware warranty maximum period after end of sale of product	5 years
Maximum investment in one obligor or maker (percent)	10.00%
Number of treasury stock shares retired	39,631,836
Carrying value of retired treasury stock	0		149,666,000
Reduction in par value and APIC from retired treasury stock				$ 100,000	$ 149,700,000