Investments and Fair Value Measurements-Fin Assets and Liabilities 2 (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 30, 2012
Financial assets measured at fair value on a recurring basis
Short-term marketable securities	$ 1,533,898		$ 1,880,034
Long-term marketable securities	2,766,474		2,835,931
Total financial assets	5,120,439		5,548,126
Financial Liabilities measured at fair value on a recurring basis
Total financial liabilities	10,351		13,584
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Total financial assets	742,523		610,129
Financial Liabilities measured at fair value on a recurring basis
Total financial liabilities	0		0
Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Total financial assets	4,377,916		4,937,997
Financial Liabilities measured at fair value on a recurring basis
Total financial liabilities	10,351		13,584
Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Total financial assets	0		0
Financial Liabilities measured at fair value on a recurring basis
Total financial liabilities	0		0
Other Current and Noncurrent Liabilities [Member]
Financial Liabilities measured at fair value on a recurring basis
Other current accrued liabilities and non-current liabilities	10,351		13,584
Other Current and Noncurrent Liabilities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial Liabilities measured at fair value on a recurring basis
Other current accrued liabilities and non-current liabilities	0		0
Other Current and Noncurrent Liabilities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial Liabilities measured at fair value on a recurring basis
Other current accrued liabilities and non-current liabilities	10,351		13,584
Other Current and Noncurrent Liabilities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial Liabilities measured at fair value on a recurring basis
Other current accrued liabilities and non-current liabilities	0		0
Cash Equivalents [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	812,313	[1]	812,103	[1]
Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	662,517	[1]	582,743	[1]
Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	149,796	[1]	229,360	[1]
Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	0	[1]	0	[1]
Short-term marketable securities [Member]
Financial assets measured at fair value on a recurring basis
Short-term marketable securities	1,533,898		1,880,034
Short-term marketable securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Short-term marketable securities	66,912		16,589
Short-term marketable securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Short-term marketable securities	1,466,986		1,863,445
Short-term marketable securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Short-term marketable securities	0		0
Long term Marketable Securities [Member]
Financial assets measured at fair value on a recurring basis
Long-term marketable securities	2,766,474		2,835,931
Long term Marketable Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Long-term marketable securities	13,094		10,797
Long term Marketable Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Long-term marketable securities	2,753,380		2,825,134
Long term Marketable Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Long-term marketable securities	0		0
Other Current and Non-Current Assets [Member]
Financial assets measured at fair value on a recurring basis
Other current assets and other non-current assets	7,754		20,058
Other Current and Non-Current Assets [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Other current assets and other non-current assets	0		0
Other Current and Non-Current Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Other current assets and other non-current assets	7,754		20,058
Other Current and Non-Current Assets [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Other current assets and other non-current assets	$ 0		$ 0

[1] Cash equivalents exclude cash of $241.8 million and $183.4 million included in Cash and cash equivalents on the Condensed Consolidated Balance Sheets as of June 30, 2013 and December 30, 2012, respectively.