Debt and Credit Sources (Details) (USD $)	3 Months Ended		12 Months Ended			1 Months Ended	3 Months Ended					3 Months Ended			12 Months Ended			0 Months Ended																																			1 Months Ended	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011	Jan. 01, 2012		Jul. 31, 2007	Feb. 28, 2012 Total [Member]	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 Other Long-term Debt [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. 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]		Apr. 01, 2012 Convertible Debt [Member] 1.25% Debentures [Member]		Jan. 01, 2012 Convertible Debt [Member] 1.25% Debentures [Member]	Feb. 28, 2007 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 Mortgages [Member] IFC Mortgage Loan [Member]	Jan. 01, 2012 Mortgages [Member] IFC Mortgage Loan [Member]	May 06, 2010 Mortgages [Member] IFC Mortgage Loan [Member]	Apr. 01, 2012 Loans Payable [Member] CEDA Loan [Member]	Apr. 01, 2012 Letter of Credit [Member] Deutsche Bank Letter of Credit Facility August 2011 [Member]	Apr. 01, 2012 Letter of Credit [Member] Deutsche Bank Trust [Member]	Mar. 31, 2012 Line of Credit [Member] Credit Agricole Revolving Credit Facility [Member]	Apr. 01, 2012 Line of Credit [Member] Credit Agricole Revolving Credit Facility [Member]	Jan. 01, 2012 Line of Credit [Member] Credit Agricole Revolving Credit Facility [Member]	Feb. 23, 2012 Credit Suisse International [Member] Convertible Debt [Member] 0.75% Debentures [Member]	Jul. 31, 2007 Credit Suisse International [Member] Convertible Debt [Member] 0.75% Debentures [Member]
Maturities of Long-term Debt [Abstract]
Face Value	$ 736,312,000																				$ 198,608,000	[1]		$ 1,233,000	[2],[3]	$ 480,079,000		$ 678,687,000		$ 250,000,000		$ 250,000,000		$ 220,000,000	$ 230,000,000		$ 230,000,000		$ 0	[1]	$ 198,600,000	$ 200,000,000	$ 79,000		$ 79,000					$ 30,000,000				$ 150,000,000
2012	0																							0	[2],[3]					0					0								0				0			0				0
2013	162,500,000																							0	[2],[3]					0					0								0				12,500,000			0				150,000,000
2014	245,000,000																							0	[2],[3]					0					230,000,000								0				15,000,000			0				0
2015	265,079,000																							0	[2],[3]					250,000,000					0								79,000				15,000,000			0				0
2016	15,000,000																							0	[2],[3]					0					0								0				15,000,000			0				0
Beyond 2016	48,733,000																							1,233,000	[2],[3]					0					0								0				17,500,000			30,000,000				0
Carrying Value																			0	[1]	196,710,000	[1]				426,851,000		619,978,000		196,772,000		193,189,000			230,000,000		230,000,000						79,000		79,000
Fair Value																			0	[1],[4]	197,615,000	[1],[4]				442,979,000	[4]	604,566,000	[4]	217,500,000	[4]	205,905,000	[4]		225,400,000	[4]	200,967,000	[4]					79,000	[4]	79,000	[4]
Own-share Lending Arrangement, Shares, Issued																																																									1,800,000
Gain (loss) on mark-to-market derivatives	13,000	(44,000)	343,000
Debt Instrument, Convertible, Conversion Price												22.53	[5]		22.53	[5]
Repayments of Long-term Debt	100,592,000	156,136,000																199,800,000
Amortization of Debt Discount (Premium)	7,099,000	7,325,000
Debt Instrument, Interest Rate, Stated Percentage											4.50%						4.75%		1.25%				0.75%
Debt Instrument, Maximum Borrowing Amount																																																	75,000,000
Restricted Cash and Cash Equivalents																																															1,400,000	1,300,000
Own Share Lending Arrangement, Lending Fee Per Share					$ 0.001
Stock price							$ 6.38	[6]		$ 6.23		$ 6.38	[5]		$ 6.23
Long-term Debt																																															75,000,000	75,000,000
Long-term debt	264,419,000		364,273,000	[7]
Line of Credit Facility, Maximum Borrowing Capacity																																																				200,000,000		275,000,000
Line of Credit Facility, Amount Outstanding																																																			708,500,000	4,400,000		150,000,000	250,000,000
Letter of Credit Facility, Maximum Borrowing Capacity, 2012																																																			725,000,000
Letter of Credit Facility, Maximum Borrowing Capacity, 2013																																																			771,000,000
Letter of Credit Facility, Maximum Borrowing Capacity, 2014																																																			878,000,000
Letter of Credit Facility, Maximum Borrowing Capacity, 2015																																																			936,000,000
Letter of Credit Facility, Maximum Borrowing Capacity, 2016																																																			1,000,000,000
Debt Instrument, Basis Spread on Variable Rate																																																	3.00%					1.50%
Debt Instrument, Borrowing Fee, Percent of Principal																																																	1.00%
Debt Instrument, Commitment Fee																																																	0.50%
Debt Instrument, Prepayment Premium																																																	1.00%
Line of Credit Facility, Basis Spread on Base Loan Rate																																																						0.50%
Line of Credit Facility, Basis Spread on Federal Funds Rate																																																						0.50%
Line of Credit Facility, Basis Spread on LIBOR Rate																																																						1.00%
Line of Credit Facility, Commitment Fee Percentage																																																						0.25%
Line of Credit Facility, Upfront Fee																																																						0.125%
Repayments of Lines of Credit																																																					100,000,000
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net							1,600,000		21,800,000			(1,600,000)		(21,900,000)
Own-share Lending Arrangement, Shares, Returned																																																								1,800,000
Line of Credit Facility, Remaining Borrowing Capacity																																																						125,000,000
Liquidity Support Facility, Maximum Capacity						600,000,000
Liquidity Support Facility, Unrestricted Cash, Cash Equivalents and Unused Borrowing Capacity, Threshold for Liquidity Support						100,000,000
Embedded Derivative, Fair Value of Embedded Derivative Liability												2,400,000			800,000
Embedded Derivative, Fair Value of Embedded Derivative Asset							2,400,000			800,000
Liquidity Support Facility, Warrant Issued, Number of Common Stock Shares						9,531,677
Liquidity Support Facility, Warrant Issued, Exercise Price Per Share						$ 7.8685
Liquidity Support Facility, Warrant Issued, Fair Value						$ 50,300,000

[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 balance of Other long-term debt excludes payments related to capital leases which are disclosed in Note 8. "Commitments and Contingencies" to these condensed consolidated financial statements.

[3] On January 31, 2012, the Company completed its acquisition of Tenesol. In fiscal 2003 and fiscal 2008 Tenesol entered into three non-recourse project loans which are scheduled to mature through 2028. As of both April 1, 2012 and January 1, 2012 these outstanding borrowings totaled $1.2 million which are classified as "Long-term debt" in the Company's Condensed Consolidated Balance Sheets.

[4] The fair value of the convertible debt was determined using Level 1 inputs based on quoted market prices as reported by an independent pricing source.

[5] 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.

[6] 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.

[7] As adjusted to reflect the balances of Tenesol S.A. ("Tenesol") beginning October 10, 2011, as required under the accounting guidelines for a transfer of an entity under common control (see Note 3).