Long-Term Debt (Schedule Of Revolving Credit Facility) (Details) (USD $)				0 Months Ended	12 Months Ended									12 Months Ended												0 Months Ended		0 Months Ended
	Dec. 31, 2013	Sep. 06, 2013	Dec. 31, 2012	Sep. 06, 2013 Revolving Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]	Dec. 31, 2013 Revolving Credit Facility [Member]	Dec. 31, 2011 Revolving Credit Facility [Member]	Jul. 22, 2011 Revolving Credit Facility [Member]	Dec. 31, 2013 North America [Member] 0.875% Convertible Notes Due 2013 [Member]	Dec. 31, 2012 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, 2013 North America [Member] Senior Floating Rate Notes Due 2015 [Member]	Dec. 31, 2012 North America [Member] Senior Floating Rate Notes Due 2015 [Member]	Dec. 31, 2013 North America [Member] Asset Based Revolving Credit Facility [Member]		Dec. 31, 2012 North America [Member] Asset Based Revolving Credit Facility [Member]		Jul. 22, 2011 UNITED STATES [Member] Revolving Credit Facility [Member]	Dec. 31, 2013 UNITED STATES [Member] Asset Based Revolving Credit Facility [Member]	Dec. 31, 2012 UNITED STATES [Member] Asset Based Revolving Credit Facility [Member]	Jul. 22, 2011 EUROPE [Member] Revolving Credit Facility [Member]	Dec. 31, 2013 EUROPE [Member] Asset Based Revolving Credit Facility [Member]	Jul. 22, 2011 CANADA [Member] Revolving Credit Facility [Member]	Dec. 31, 2013 CANADA [Member] Asset Based Revolving Credit Facility [Member]	Dec. 31, 2012 CANADA [Member] Asset Based Revolving Credit Facility [Member]	Sep. 06, 2013 Minimum [Member] Revolving Credit Facility [Member]	Dec. 31, 2012 Minimum [Member] Potential Increase [Member] Revolving Credit Facility [Member]	Sep. 06, 2013 Maximum [Member] Revolving Credit Facility [Member]	Dec. 31, 2011 Parent Company [Member] Senior Floating Rate Notes Due 2015 [Member]
Debt Instrument [Line Items]
Borrowing capacity under credit facility				$ 1,000,000,000.0	$ 700,000,000			$ 400,000,000										$ 630,000,000			$ 300,000,000		$ 70,000,000
Debt principal amount											355,000,000.0
Debt maturity date																													2015
Deferred financing costs capitalized					2,300,000	4,900,000	4,800,000
Threshold for line of credit facility borrowings																										100,000,000
Threshold for line of credit facility percentage of asset based revolving credit facilities				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%
Additional borrowings				250,000,000
Line of credit facility commitment fee, percentage																										0.25%		0.375%
Capital expenditures to fixed charges ratio				100.00%	115.00%
Outstanding borrowings	1,386,900,000		1,450,100,000						0	334,600,000				225,000,000		0
Total credit under facility														1,000,000,000		700,000,000
Undrawn availability														298,400,000	[1]	515,300,000	[1]		102,100,000	471,000,000		143,200,000		53,100,000	44,300,000		100,000,000
Interest rate									0.875%	0.875%	0.875%	2.60%	2.70%	2.00%		1.50%
Outstanding letters of credit	$ 150,700,000													$ 112,700,000		$ 18,300,000
Original issuance														Jul. 31, 2011		Jul. 31, 2011
Maturity date														Sep. 30, 2018		Jul. 31, 2017

[1] Total undrawn availability for the U.S. borrower, the Canadian borrower and the European borrowers at December 31, 2013 is $102.1 million, $53.1 million and $143.2 million, respectively. Total undrawn availability for the U.S. borrower, and the Canadian borrower at December 31, 2012 was $471.0 million and $44.3 million , respectively.