Investments and Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	Jan. 01, 2012	Jan. 02, 2011
Financial assets measured at fair value on a recurring basis
Derivative assets	$ 21,093	$ 19,462
Other	4,501	4,379
Total financial assets	5,454,454	5,151,076
Financial Liabilities measured at fair value on a recurring basis
Derivative liabilities	45,835	76,762
Total financial liabilities	45,835	76,762
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Derivative assets	0	0
Other	0	0
Total financial assets	1,115,931	709,201
Financial Liabilities measured at fair value on a recurring basis
Derivative 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
Derivative assets	21,093	19,462
Other	4,501	4,379
Total financial assets	4,338,523	4,441,875
Financial Liabilities measured at fair value on a recurring basis
Derivative liabilities	45,835	76,762
Total financial liabilities	45,835	76,762
Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Derivative assets	0	0
Other	0	0
Total financial assets	0	0
Financial Liabilities measured at fair value on a recurring basis
Derivative liabilities	0	0
Total financial liabilities	0	0
Money Market Funds [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	901,500	587,973
Money Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	901,500	587,973
Money Market Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	0	0
Money Market Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Cash equivalents	0	0
Fixed Income Securities [Member]
Financial assets measured at fair value on a recurring basis
Securities	4,527,360	4,448,837
Fixed Income Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Securities	214,431	30,803
Fixed Income Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Securities	4,312,929	4,418,034
Fixed Income Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Securities	0	0
Equity Securities [Member]
Financial assets measured at fair value on a recurring basis
Securities	0	90,425
Equity Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis
Securities	0	90,425
Equity Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis
Securities	0	0
Equity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis
Securities	$ 0	$ 0