Investments and Fair Value Measurements-AFS FV and Unrealized Losses (Details 5) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2013
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	$ 645,698
Less than 12 months, Gross Unrealized Loss	(2,654)
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	17,520
Less 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	2,745
Less than 12 months, Gross Unrealized Loss	(5)
International Government Securities [Member]
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	0
Less 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	134,699
Less than 12 months, Gross Unrealized Loss	(310)
Asset-backed securities [Member]
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	70,872
Less than 12 months, Gross Unrealized Loss	(125)
Mortgage Backed Securities, Other [Member]
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	382
Less than 12 months, Gross Unrealized Loss	(10)
Municipal notes and bonds [Member]
Available-for-sale securities that were in an unrealized gain position
Less than 12 months, Fair Value	419,480
Less than 12 months, Gross Unrealized Loss	$ (2,204)