Investments (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 29, 2013	Dec. 29, 2012
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 1,246,916	$ 1,314,641
Gross Unrealized Gains	455	863
Gross Unrealized Losses	(1,532)	(537)
Fair Value	1,245,839	1,314,967
Cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	40,485	92,335
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	40,485	92,335
Cash equivalents [Member] | Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	28,921	68,267
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	28,921	68,267
Cash equivalents [Member] | Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	10,499	24,068
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	10,499	24,068
Cash equivalents [Member] | Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	1,065
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	1,065
Short-term investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	698,498	719,271
Gross Unrealized Gains	389	529
Gross Unrealized Losses	(133)	(135)
Fair Value	698,754	719,665
Short-term investments [Member] | Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	50,985	90,535
Gross Unrealized Gains	3	17
Gross Unrealized Losses	(1)	(2)
Fair Value	50,987	90,550
Short-term investments [Member] | Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	81,500	86,500
Gross Unrealized Gains	24	15
Gross Unrealized Losses	(12)	(57)
Fair Value	81,512	86,458
Short-term investments [Member] | Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	566,013	542,236
Gross Unrealized Gains	362	497
Gross Unrealized Losses	(120)	(76)
Fair Value	566,255	542,657
Long-term investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	507,933	503,035
Gross Unrealized Gains	66	334
Gross Unrealized Losses	(1,399)	(402)
Fair Value	506,600	502,967
Long-term investments [Member] | Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	3,985	6,190
Gross Unrealized Gains	10	10
Gross Unrealized Losses	(2)	(3)
Fair Value	3,993	6,197
Long-term investments [Member] | Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	503,948	496,845
Gross Unrealized Gains	56	324
Gross Unrealized Losses	(1,397)	(399)
Fair Value	$ 502,607	$ 496,770