Investments and Fair Value Measurements-Debt Instrument FV (Details 8) (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Jan. 01, 2012
Related costs and the fair values based on quoted market prices
Convertible Debt	$ 1,650,027	$ 1,604,911
Convertible Debt [Member]
Related costs and the fair values based on quoted market prices
Convertible Debt	1,650,027	1,604,911
Fair Value	1,927,493	2,091,640
1% Sr. Convertible Notes due 2013 [Member]
Related costs and the fair values based on quoted market prices
Convertible Debt	878,929	852,146
Fair Value	922,493	914,140
1.5% Sr. Convertible Notes due 2017 [Member]
Related costs and the fair values based on quoted market prices
Convertible Debt	771,098	752,765
Fair Value	$ 1,005,000	$ 1,177,500