Investments (Details) (USD $) In Thousands, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 1,319,899	$ 1,287,802
Gross Unrealized Gains	96	715
Gross Unrealized Losses	(603)	(367)
Fair Value	1,319,392	1,288,150
Cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	314,764	68,435
Fair Value	314,764	68,435
Cash equivalents [Member] | Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	189,137	57,254
Fair Value	189,137	57,254
Cash equivalents [Member] | Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	9,989	7,771
Fair Value	9,989	7,771
Cash equivalents [Member] | Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	115,638	3,000
Fair Value	115,638	3,000
Cash equivalents [Member] | Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost		410
Fair Value		410
Short-term investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	785,696	676,723
Gross Unrealized Gains	70	369
Gross Unrealized Losses	(103)	(88)
Fair Value	785,663	677,004
Short-term investments [Member] | Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	52,830	70,303
Gross Unrealized Gains		12
Gross Unrealized Losses	(1)
Fair Value	52,829	70,315
Short-term investments [Member] | Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	435,555	33,750
Gross Unrealized Gains	1	1
Gross Unrealized Losses	(12)	(9)
Fair Value	435,544	33,742
Short-term investments [Member] | Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	297,311	572,670
Gross Unrealized Gains	69	356
Gross Unrealized Losses	(90)	(79)
Fair Value	297,290	572,947
Long-term investments [Member] | Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	219,439	542,644
Gross Unrealized Gains	26	346
Gross Unrealized Losses	(500)	(279)
Fair Value	$ 218,965	$ 542,711