Investments (Details) (USD $) In Thousands, unless otherwise specified	Apr. 04, 2015	Jan. 03, 2015
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 524,785	$ 1,319,899
Gross Unrealized Gains	230	96
Gross Unrealized Losses	(107)	(603)
Fair Value	524,908	1,319,392
Cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	39,112	314,764
Fair Value	39,112	314,764
Cash equivalents [Member] | Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	29,679	189,137
Fair Value	29,679	189,137
Cash equivalents [Member] | Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	8,398	9,989
Fair Value	8,398	9,989
Cash equivalents [Member] | Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost		115,638
Fair Value		115,638
Cash equivalents [Member] | Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	1,035
Fair Value	1,035
Short-term investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	293,783	785,696
Gross Unrealized Gains	105	70
Gross Unrealized Losses	(61)	(103)
Fair Value	293,827	785,663
Short-term investments [Member] | Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	27,246	52,830
Gross Unrealized Losses		(1)
Fair Value	27,246	52,829
Short-term investments [Member] | Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	2,600	435,555
Gross Unrealized Gains		1
Gross Unrealized Losses	(1)	(12)
Fair Value	2,599	435,544
Short-term investments [Member] | Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	263,937	297,311
Gross Unrealized Gains	105	69
Gross Unrealized Losses	(60)	(90)
Fair Value	263,982	297,290
Long-term investments [Member] | Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	191,890	219,439
Gross Unrealized Gains	125	26
Gross Unrealized Losses	(46)	(500)
Fair Value	$ 191,969	$ 218,965