Convertible Senior Notes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 01, 2012	Jan. 02, 2011	Jan. 03, 2010
Summarized information about equity and liability components of convertible senior notes
Current portion of long-term debt	$ 0	$ 311,609
Long-term debt	807,369	0
Conversion option subject to cash settlement	5,722	78,390
Accretion of discount on the liability component	32,173	21,407	20,286
0.625% Convertible senior notes due 2014 [Member]
Summarized information about equity and liability components of convertible senior notes
Principal amount of convertible notes outstanding	40,125	389,999
Unamortized discount of liability component	(5,722)	(78,390)
Net carrying amount of liability component	34,403	311,609
Current portion of long-term debt	0	311,609
Long-term debt	34,403	0
Conversion option subject to cash settlement	5,722	78,390
Carrying value of equity component, net of debt issuance cost	114,035	71,199
Fair value of outstanding notes	60,122	1,157,450
Remaining amortization period of discount on the liability component	2.1	3.1
Effective interest rate of liability component	8.30%	8.30%
Contractual coupon interest expense	414	2,390
Accretion of discount on the liability component	7,671	21,407
0.25% Convertible Senior Notes due 2016 [Member]
Summarized information about equity and liability components of convertible senior notes
Principal amount of convertible notes outstanding	920,000
Unamortized discount of liability component	(147,034)
Net carrying amount of liability component	772,966
Current portion of long-term debt	0
Long-term debt	772,966
Conversion option subject to cash settlement
Carrying value of equity component, net of debt issuance cost	155,366
Fair value of outstanding notes	725,632
Remaining amortization period of discount on the liability component	4.2
Effective interest rate of liability component	4.50%
Contractual coupon interest expense	1,871
Accretion of discount on the liability component	$ 24,502