Balance Sheet Account Details (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012
Available-for-sale securities:
Available for sale securities, Amortized Cost	$ 454,055	$ 914,883
Available for sale securities, Gross Unrealized Gains	388	1,543
Available for sale securities, Gross Unrealized Losses	(477)	(203)
Total Estimated Fair Value	453,966	916,223
Debt securities in government sponsored entities [Member]
Available-for-sale securities:
Available for sale securities, Amortized Cost	82,226	314,638
Available for sale securities, Gross Unrealized Gains	18	251
Available for sale securities, Gross Unrealized Losses	(101)	(16)
Total Estimated Fair Value	82,143	314,873
Corporate debt securities [Member]
Available-for-sale securities:
Available for sale securities, Amortized Cost	342,034	471,989
Available for sale securities, Gross Unrealized Gains	312	1,059
Available for sale securities, Gross Unrealized Losses	(376)	(187)
Total Estimated Fair Value	341,970	472,861
U.S. Treasury securities [Member]
Available-for-sale securities:
Available for sale securities, Amortized Cost	29,795	128,256
Available for sale securities, Gross Unrealized Gains	58	233
Total Estimated Fair Value	$ 29,853	$ 128,489