Investments and Fair Value Measurements-Fin Assets and Liabilities 2 (Details 3) (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Jan. 01, 2012
Financial assets measured at fair value on a recurring basis
Marketable Securities, Current	$ 1,468,206	$ 1,681,492
Marketable Securities, Noncurrent	2,724,382	2,766,263
Other current assets and other non-current assets	5,659	25,594
Total assets	5,018,858	5,454,454
Financial Liabilities measured at fair value on a recurring basis
Other current accrued liabilities fair value disclosure	18,096	40,045
Non-current liabilities	1,745	5,790
Total financial liabilities	19,841	45,835
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Marketable Securities, Current	36,722	155,538
Marketable Securities, Noncurrent	7,634	33,399
Other current assets and other non-current assets	0	0
Total assets	731,733	1,115,931
Financial Liabilities measured at fair value on a recurring basis
Other current accrued liabilities fair value disclosure	0	0
Non-current liabilities	0	0
Total financial liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Marketable Securities, Current	1,431,484	1,525,954
Marketable Securities, Noncurrent	2,716,748	2,732,864
Other current assets and other non-current assets	5,659	25,594
Total assets	4,287,125	4,338,523
Financial Liabilities measured at fair value on a recurring basis
Other current accrued liabilities fair value disclosure	18,096	40,045
Non-current liabilities	1,745	5,790
Total financial liabilities	19,841	45,835
Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Marketable Securities, Current	0	0
Marketable Securities, Noncurrent	0	0
Other current assets and other non-current assets	0	0
Total assets	0	0
Financial Liabilities measured at fair value on a recurring basis
Other current accrued liabilities fair value disclosure	0	0
Non-current liabilities	0	0
Total financial liabilities	0	0
Cash Equivalents [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	820,611	981,105
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	687,377	926,994
Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	133,234	54,111
Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	$ 0	$ 0