Long-Term Debt (Schedule Of Revolving Credit Facility) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended			3 Months Ended	12 Months Ended			0 Months Ended			0 Months Ended					0 Months Ended												3 Months Ended
	Jul. 22, 2011	Mar. 29, 2013	Dec. 31, 2012	Mar. 29, 2013 North America [Member] Asset Based Revolving Credit Facility [Member]	Dec. 31, 2011 North America [Member] Asset Based Revolving Credit Facility [Member]	Dec. 31, 2012 North America [Member] Asset Based Revolving Credit Facility [Member]	Jul. 22, 2011 North America [Member] Asset Based Revolving Credit Facility [Member]	Jul. 22, 2011 North America [Member] Terminated Credit Facility [Member]	Jul. 22, 2011 UNITED STATES [Member] Asset Based Revolving Credit Facility [Member]	Jul. 22, 2011 CANADA [Member] Asset Based Revolving Credit Facility [Member]	Jul. 22, 2011 Minimum [Member] Asset Based Revolving Credit Facility [Member]	Jul. 22, 2011 Maximum [Member] Asset Based Revolving Credit Facility [Member]	Jul. 22, 2011 Potential Increase [Member] Minimum [Member] North America [Member] Asset Based Revolving Credit Facility [Member]	Dec. 31, 2011 Asset Based Revolving Credit Facility [Member]	Jul. 22, 2011 Asset Based Revolving Credit Facility [Member] Minimum [Member]	Jul. 22, 2011 Asset Based Revolving Credit Facility [Member] Potential Increase [Member]	Mar. 29, 2013 Senior Floating Rate Notes Due 2015 [Member] North America [Member]		Dec. 31, 2012 Senior Floating Rate Notes Due 2015 [Member] North America [Member]		Mar. 21, 2007 Senior Floating Rate Notes Due 2015 [Member] North America [Member]	Jul. 22, 2011 0.875% Convertible Notes Due 2013 [Member]	Mar. 29, 2013 0.875% Convertible Notes Due 2013 [Member] North America [Member]	Dec. 31, 2012 0.875% Convertible Notes Due 2013 [Member] North America [Member]	Nov. 30, 2006 0.875% Convertible Notes Due 2013 [Member] North America [Member]	Dec. 31, 2011 Parent Company [Member] Senior Floating Rate Notes Due 2015 [Member] North America [Member]	Dec. 31, 2011 Parent Company [Member] 0.875% Convertible Notes Due 2013 [Member] North America [Member]	Sep. 30, 2011 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity							$ 700	$ 400	$ 630	$ 70
Debt principal amount																					125.0	355.0			355.0	125.0
Debt instrument maturity dates																										2015	2013
Capital expenditures to fixed charges ratio	115.00%
Line of Credit Facility, Increase, Additional Borrowings																100
Capitalized deferred finance costs														4.8
Unamortized fees and expenses																												1.3
Threshold for line of credit facility borrowings															70
Threshold for line of credit facility percentage of asset based revolving credit facililties							10.00%
Equity Interest Pledged in All Domestic Subsidiaries, Percentage	100.00%
Equity interest pledged in foreign subsidiaries, percentage							65.00%
Non-Voting Equity Interest Pledged in Certain Foreign Subsidiaries, Percentage	100.00%
Line of credit facility commitment fee, percentage											0.375%	0.50%
Outstanding borrowings		1,548.0	1,450.1	0		0																	340.0	334.6
Line of Credit Facility, Amount Outstanding				700.0		700.0
Undrawn availability				570.9		515.3							100.0
Interest rate						1.50%											2.70%	[1]	2.70%	[1]			0.875%	0.875%	0.875%
Outstanding letters of credit		$ 53.2		$ 18.3		$ 18.3
Original issuance				Jul. 31, 2011	Jul. 31, 2011
Maturity date				Jul. 31, 2016	Jul. 31, 2016			Jul. 31, 2012

[1] Jointly and severally guaranteed by the Company's wholly-owned U.S. subsidiaries.