Investments and Fair Value Measurements (Details 8) (USD $) In Thousands, unless otherwise specified	Jan. 01, 2012	Jan. 02, 2011
Related costs and the fair values based on quoted market prices
Convertible long-term debt, carrying value	$ 1,604,911	$ 1,711,032
Convertible Debt [Member]
Related costs and the fair values based on quoted market prices
Convertible long-term debt, carrying value	1,604,911	1,711,032
Fair Value	2,091,640	2,250,875
1% Sr. Convertible Notes due 2013 [Member]
Related costs and the fair values based on quoted market prices
Convertible long-term debt, carrying value	852,146	993,199
Fair Value	914,140	1,118,375
1.5% Sr. Convertible Notes due 2017 [Member]
Related costs and the fair values based on quoted market prices
Convertible long-term debt, carrying value	752,765	717,833
Fair Value	$ 1,177,500	$ 1,132,500