Debt and Credit Sources - Convertible Debenture and Related Transactions (Details) (USD $)	3 Months Ended					12 Months Ended		3 Months Ended			12 Months Ended		0 Months Ended													1 Months Ended	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011	Apr. 01, 2012 Bond Hedge [Member]		Apr. 03, 2011 Bond Hedge [Member]	Jan. 01, 2012 Bond Hedge [Member]	Apr. 01, 2012 4.50% Debentures [Member]	Apr. 01, 2012 4.50% Debentures [Member] Embedded Cash Conversion Option [Member]		Apr. 03, 2011 4.50% Debentures [Member] Embedded Cash Conversion Option [Member]	Jan. 01, 2012 4.50% Debentures [Member] Embedded Cash Conversion Option [Member]	Apr. 01, 2012 4.75% Debentures [Member]	Feb. 16, 2012 1.25% Debentures [Member]	Apr. 01, 2012 1.25% Debentures [Member]	Jan. 01, 2012 1.25% Debentures [Member]		Apr. 01, 2012 0.75% Debentures [Member]	Apr. 01, 2012 Convertible Debt [Member]	Jan. 01, 2012 Convertible Debt [Member]	Apr. 01, 2012 Convertible Debt [Member] 4.50% Debentures [Member]	Jan. 01, 2012 Convertible Debt [Member] 4.50% Debentures [Member]	Apr. 04, 2010 Convertible Debt [Member] 4.50% Debentures [Member]	Apr. 01, 2010 Convertible Debt [Member] 4.50% Debentures [Member]	Apr. 01, 2012 Convertible Debt [Member] 4.75% Debentures [Member]	Jan. 01, 2012 Convertible Debt [Member] 4.75% Debentures [Member]	Feb. 28, 2007 Convertible Debt [Member] 1.25% Debentures [Member]	Dec. 28, 2008 Convertible Debt [Member] 1.25% Debentures [Member]	Apr. 01, 2012 Convertible Debt [Member] 1.25% Debentures [Member]		Jan. 01, 2012 Convertible Debt [Member] 1.25% Debentures [Member]	Apr. 01, 2012 Convertible Debt [Member] 0.75% Debentures [Member]	Jan. 01, 2012 Convertible Debt [Member] 0.75% Debentures [Member]	Apr. 01, 2012 Warrants [Member] Warrant [Member]	Oct. 02, 2011 Warrants [Member] Warrant [Member]
Convertible Debt and Related Transactions [Line Items]
Debt Instrument, Face Amount	$ 736,312,000														$ 198,608,000	[1]		$ 480,079,000	$ 678,687,000	$ 250,000,000	$ 250,000,000		$ 220,000,000	$ 230,000,000	$ 230,000,000	$ 200,000,000		$ 0	[1]	$ 198,600,000	$ 79,000	$ 79,000
Repayments of Long-term Debt	100,592,000	156,136,000											199,800,000
Proceeds from Issuance of Debt																										194,000,000
Debt Instrument, Convertible, Call Feature, Amount Called																											1,400,000
Repayments of Convertible Debt	198,608,000	0																									1,200,000
Debt Instrument, Convertible, Number of Equity Instruments																											1,000
Debt Over Allotment Option																						30,000,000
Debt Instrument, Interest Rate, Stated Percentage							4.50%					4.75%		1.25%			0.75%
Embedded Derivative, Fair Value of Embedded Derivative Liability								2,400,000			800,000
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net			1,600,000		21,800,000			(1,600,000)		(21,900,000)
Valuation Input [Abstract]
Stock price			$ 6.38	[2]		$ 6.23		$ 6.38	[3]		$ 6.23
Exercise price			$ 22.53	[2]		$ 22.53
Interest rate			0.73%	[2]		0.84%		0.73%	[3]		0.84%
Stock volatility			46.40%	[2]		44.00%		46.40%	[3]		44.00%
Credit risk adjustment			2.26%	[2]		1.93%
Maturity date			Feb. 18, 2015	[2]		Feb. 18, 2015		Feb. 18, 2015	[3]		Feb. 18, 2015
Derivative, Nonmonetary Notional Amount			11,100,000
Class of Warrant or Right, Exercise Price of Warrants or Rights																																	24.00	27.03
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																																	11,100,000
Embedded Derivative, Fair Value of Embedded Derivative Asset			$ 2,400,000			$ 800,000

[1] The carrying value of the 1.25% senior convertible debentures ("1.25% debentures") was classified as short-term liabilities within "Convertible debt, current portion" in the Condensed Consolidated Balance Sheet as of January 1, 2012 due to the holders' ability to require the Company to repurchase all of their 1.25% debentures on February 15, 2012. On February 16, 2012, the Company repurchased 100% of the outstanding principal amount of the 1.25% debentures plus accrued and unpaid interest.

[2] The valuation model utilizes these inputs to value the right but not the obligation to purchase one share at $22.53 for the 4.50% Bond Hedge. The Company utilized a Black-Scholes valuation model to value the 4.50% Bond Hedge. The underlying input assumptions were determined as follows:(i)Stock price. The closing price of the Company's common stock on the last trading day of the quarter.(ii)Exercise price. The exercise price of the 4.50% Bond Hedge.(iii)Interest rate. The Treasury Strip rate associated with the life of the 4.50% Bond Hedge.(iv)Stock volatility. The volatility of the Company's common stock over the life of the 4.50% Bond Hedge.(v)Credit risk adjustment. Represents the weighted average of the credit default swap rate of the counterparties.

[3] The valuation model utilizes these inputs to value the right but not the obligation to purchase one share at $22.53. The Company utilized a Black-Scholes valuation model to value the embedded cash conversion option. The underlying input assumptions were determined as follows:(i)Stock price. The closing price of the Company's common stock on the last trading day of the quarter.(ii)Exercise price. The exercise price of the embedded conversion option.(iii)Interest rate. The Treasury Strip rate associated with the life of the embedded conversion option.(iv)Stock volatility. The volatility of the Company's common stock over the life of the embedded conversion option.