Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended								12 Months Ended									12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 15, 2009 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 31, 2012 0.875% Convertible Notes Due 2013 [Member]	Dec. 31, 2012 New Buildings [Member] Minimum [Member]	Dec. 31, 2012 New Buildings [Member] Maximum [Member]	Dec. 31, 2012 Machinery, Equipment and Office Furnishings [Member] Minimum [Member]	Dec. 31, 2012 Machinery, Equipment and Office Furnishings [Member] Maximum [Member]	Dec. 31, 2012 Automotive [Member] Minimum [Member]	Dec. 31, 2012 Automotive [Member] Maximum [Member]	Dec. 31, 2012 Copper Rod [Member] Supplier Concentration Risk [Member]	Dec. 31, 2012 Aluminum Rod [Member] Supplier Concentration Risk [Member]	Dec. 31, 2012 Significant Influence [Member]	Dec. 31, 2012 Allowance for Doubtful Accounts [Member]	Dec. 31, 2011 Allowance for Doubtful Accounts [Member]	Dec. 31, 2010 Allowance for Doubtful Accounts [Member]	Dec. 31, 2012 North America [Member] 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 31, 2011 North America [Member] 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 15, 2009 North America [Member] 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 31, 2012 North America [Member] 0.875% Convertible Notes Due 2013 [Member]	Dec. 31, 2011 North America [Member] 0.875% Convertible Notes Due 2013 [Member]	Nov. 30, 2006 North America [Member] 0.875% Convertible Notes Due 2013 [Member]	Dec. 31, 2012 North America [Member] Parent Company [Member] 1.00% Senior Convertible Notes Due 2012 [Member]	Dec. 31, 2012 North America [Member] Parent Company [Member] 0.875% Convertible Notes Due 2013 [Member]	Dec. 31, 2011 North America [Member] Parent Company [Member] 0.875% Convertible Notes Due 2013 [Member]
Debt Instrument [Line Items]
Minimum percent of ownership to exercise significant influence																	20.00%
Maximum percent of ownership to exercise significant influence																	50.00%
Percentage of ownership recorded at cost					20.00%
Interest rate						1.00%	1.00%	0.875%													1.00%	1.00%	1.00%	0.875%	0.875%	0.875%
Debt maturity date																					2012						2012	2013	2013
Restricted cash	$ 18.2
Percentage of weighted average cost inventory	84.00%
Useful life, minimum									15 years	50 years	2 years	15 years
Assets held-for-sale		5.5
Decrease in estimated fair value that would have no impact on carrying value	5.00%
Restructuring charges	7.5	5.3
Payment period on purchases				30 days	60 days								45 days	210 days
Bad debt expense associate with uncollectable accounts																		21.9	4.4	4.9
Concentration risk, percentage															90.00%	70.00%
Deferred tax (liabilities)	(170.4)	(149.6)
Net current deferred tax asset	38.3
Net long term deferred tax liabilities	208.7
Deferred tax assets, valuation allowance	74.3	40.1
Shipping and handling costs	150.4	137.8	119.4
Advertising expense	$ 10.7	$ 11.2	$ 12.0