Derivative Instruments and Hedging Activities Fair Value Balance Sheet (Details) In Millions, unless otherwise specified	Sep. 29, 2012 Designated as Hedging Instrument [Member] USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Cross currency swaps CAD	Dec. 31, 2011 Designated as Hedging Instrument [Member] Cross currency swaps CAD	Sep. 29, 2012 Designated as Hedging Instrument [Member] Cross currency swaps Other current assets USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Cross currency swaps Other current assets USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Cross currency swaps Other assets USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Cross currency swaps Other assets USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Cross currency swaps Current derivative liability USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Cross currency swaps Current derivative liability USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Cross currency swaps Long term derivative liability USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Cross currency swaps Long term derivative liability USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Foreign currency forwards USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Foreign currency forwards USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Foreign currency forwards Other current assets USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Foreign currency forwards Other current assets USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Foreign currency forwards Other assets USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Foreign currency forwards Other assets USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Foreign currency forwards Current derivative liability USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Foreign currency forwards Current derivative liability USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Foreign currency forwards Long term derivative liability USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Foreign currency forwards Long term derivative liability USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Commodity swaps gigajoules	Dec. 31, 2011 Designated as Hedging Instrument [Member] Commodity swaps gigajoules	Sep. 29, 2012 Designated as Hedging Instrument [Member] Commodity swaps Other current assets USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Commodity swaps Other current assets USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Commodity swaps Other assets USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Commodity swaps Other assets USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Commodity swaps Current derivative liability USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Commodity swaps Current derivative liability USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Commodity swaps Long term derivative liability USD ($)	Dec. 31, 2011 Designated as Hedging Instrument [Member] Commodity swaps Long term derivative liability USD ($)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Investment Hedge EUR (€)	Sep. 29, 2012 Designated as Hedging Instrument [Member] Investment Hedge Long-term debt EUR (€)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] USD ($)	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] USD ($)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Equity conversion feature of debt EUR (€)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Equity conversion feature of debt Current derivative liability USD ($)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Aluminum [Member] t	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Aluminum [Member] t	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Aluminum [Member] Other current assets USD ($)	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Aluminum [Member] Other current assets USD ($)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Aluminum [Member] Other assets USD ($)	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Aluminum [Member] Other assets USD ($)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Aluminum [Member] Current derivative liability USD ($)	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Aluminum [Member] Current derivative liability USD ($)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Aluminum [Member] Long term derivative liability USD ($)	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Aluminum [Member] Long term derivative liability USD ($)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Deisel [Member] t	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Deisel [Member] t	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Deisel [Member] Other current assets USD ($)	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Deisel [Member] Other current assets USD ($)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Deisel [Member] Other assets USD ($)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Deisel [Member] Current derivative liability USD ($)	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Deisel [Member] Current derivative liability USD ($)	Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Deisel [Member] Long term derivative liability USD ($)
Derivatives designated as hedging instruments:
Notional Amounts			601.3	901.3									$ 511.7	$ 464.6
Notional Amount of Derivatives Nonmonetary Designated as Hedging Instrument, Energy																							1,800,000	2,200,000
Derivative asset, fair value, designated as hedging instrument	0.9	3.4			0	0	0	0							0.3	0	0.4	3.4							0.1	0	0.1	0
Derivative fair value, liability	(234.3)	(315.5)							0	(103.2)	(222.2)	(208.7)							(6.9)	(1.3)	(3.9)	0							(1.2)	(1.8)	(0.1)	(0.5)
Derivatives not designated as hedging instruments:
Notional Amount of Other Derivatives Not Designated as Hedging Instruments																																					500.0
Notional amount of derivatives not designated as hedging instrument In Metric Tonnes																																							4,050	8,825									6,251	9,668
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value																																			0.1	0.1					0	0	0	0							0.1	0.1	0
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value																																			(31.0)	(4.6)		(29.0)							(1.7)	(1.3)	(0.2)	(3.3)						0	0	(0.1)
Non-derivative financial instruments in net investment hedge relationships																																	93.7
Non-derivative financial instruments in net investment hedge relationships, at fair value																																		€ (120.5)