Long-Term Debt (Schedule Of Revolving Credit Facility) (Details) (USD $)	0 Months Ended	6 Months Ended	12 Months Ended
	Sep. 06, 2013	Jun. 27, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jul. 22, 2011
Debt Instrument [Line Items]
Outstanding borrowings		$ 1,554,700,000	$ 1,386,900,000
Outstanding letters of credit		59,300,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	1,000,000,000.0		700,000,000			400,000,000
Capital expenditures to fixed charges ratio	100.00%			115.00%
Increase, additional borrowings	250,000,000
Capitalized deferred finance costs			4,900,000	2,300,000	4,800,000
Threshold for line of credit facility percentage of asset based revolving credit facilities	10.00%
Outstanding borrowings		339,300,000	225,000,000
Total credit under facility		1,000,000,000	1,000,000,000
Undrawn availability		436,400,000	298,400,000
Interest rate		2.00%	2.00%
Outstanding letters of credit		28,500,000	112,700,000
Original issuance		Jul. 31, 2011	Jul. 31, 2011
Maturity date		Sep. 30, 2018	Sep. 30, 2018
Revolving Credit Facility [Member] | UNITED STATES [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity						630,000,000
Undrawn availability		249,200,000	102,100,000
Revolving Credit Facility [Member] | CANADA [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity						70,000,000
Undrawn availability		65,500,000	53,100,000
Revolving Credit Facility [Member] | Europe [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity						300,000,000
Undrawn availability		121,700,000	143,200,000
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Potential increase in remaining borrowing capacity				100,000,000
Threshold for line of credit facility borrowings	$ 100,000,000