Investments and Fair Value Measurements (Details 3) (USD $) In Thousands	Jul. 03, 2011
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	$ 715,560
Less than 12 months, Gross Unrealized Loss	(2,320)
Greater than 12 months, Fair Value	0
Greater than 12 months, Gross Unrealized Loss	0
U.S. Treasury and government agency Securities [Member]
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	13,544
Less than 12 months, Gross Unrealized Loss	(4)
Greater than 12 months, Fair Value	0
Greater than 12 months, Gross Unrealized Loss	0
U.S. government-sponsored agency securities [Member]
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	20,119
Less than 12 months, Gross Unrealized Loss	(16)
Greater than 12 months, Fair Value	0
Greater than 12 months, Gross Unrealized Loss	0
Corporate notes and bonds [Member]
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	133,947
Less than 12 months, Gross Unrealized Loss	(284)
Greater than 12 months, Fair Value	0
Greater than 12 months, Gross Unrealized Loss	0
Asset-backed Securities [Member]
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	40,102
Less than 12 months, Gross Unrealized Loss	(71)
Greater than 12 months, Fair Value	0
Greater than 12 months, Gross Unrealized Loss	0
Municipal notes and bonds [Member]
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	507,848
Less than 12 months, Gross Unrealized Loss	(1,945)
Greater than 12 months, Fair Value	0
Greater than 12 months, Gross Unrealized Loss	$ 0