Goodwill and Other Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended			9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 28, 2012 Customer Relationships [Member] Minimum [Member]	Sep. 28, 2012 Customer Relationships [Member] Maximum [Member]	Sep. 04, 2012 Alcan Cable [Member] North America [Member] Customer Relationships [Member]	Sep. 04, 2012 Other Immaterial Acquisitions [Member] Customer Relationships [Member]
Intangible asset						$ 5.9
Amortized intangible assets, net	48.1		46.4				3.4
Finite lived intangible assets useful life				3 years 6 months	12 years
Amortization of intangible assets	8.2	9.4
Estimated amortization expense - 2012	10.3
Estimated amortization expense - 2013	9.5
Estimated amortization expense - 2014	8.6
Estimated amortization expense - 2015	7.7
Estimated amortization expense - 2016	6.2
Estimated amortization expense, thereafter	$ 5.8