Long-Term Debt (Schedule Of 7.125% Senior Notes And Senior Floating Rate Notes) (Details) (USD $)			1 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended	12 Months Ended			1 Months Ended
	Mar. 30, 2012	Dec. 31, 2011	Mar. 21, 2007 North America [Member] Senior Unsecured Notes [Member]	Mar. 30, 2012 North America [Member] 7.125% Senior Notes Due 2017 [Member]		Dec. 31, 2011 North America [Member] 7.125% Senior Notes Due 2017 [Member]	Mar. 21, 2007 North America [Member] 7.125% Senior Notes Due 2017 [Member]	Mar. 30, 2012 North America [Member] Senior Floating Rate Notes Due 2015 [Member]	Dec. 31, 2011 North America [Member] Senior Floating Rate Notes Due 2015 [Member]		Mar. 21, 2007 North America [Member] Senior Floating Rate Notes Due 2015 [Member]	Mar. 21, 2007 North America [Member] 9.5% Senior Notes [Member]
Debt Instrument [Line Items]
Debt principal amount			$ 325,000,000.0				$ 200,000,000				$ 125,000,000
Face value	1,114,600,000	1,048,900,000		200,000,000		200,000,000		125,000,000	125,000,000
Fair value				207,200,000		198,500,000		117,000,000	117,500,000
Interest rate				7.125%		7.125%	7.125%	2.80%	3.00%			9.50%
Debt instrument, payment terms				Semi-annually: Apr 1 & Oct 1		Semi-annually: Apr 1 & Oct 1		3-month LIBOR rate plus 2.375% Quarterly: Jan 1, Apr 1, Jul 1 & Oct 1	3-month LIBOR rate plus 2.375% Quarterly: Jan 1, Apr 1, Jul 1 & Oct 1
Description of variable rate basis				LIBOR		LIBOR
Maturity date				April 2017		April 2017		July 2015	July 2015
Basis spread on variable rate								2.375%	2.375%
Call Option, Beginning Date, year one				Apr. 01, 2012	[1]				Apr. 01, 2009	[1]
Call Option, Beginning Date, year two				Apr. 01, 2013	[1]				Apr. 01, 2010	[1]
Call Option, Beginning Date, year three				Apr. 01, 2014	[1]				Apr. 01, 2011	[1]
Call Option, Beginning Date, year four				Apr. 01, 2015	[1]
Call Option, Percentage, year one				103.563%	[1]				102.00%	[1]
Call Option, Percentage, year two				102.375%	[1]				101.00%	[1]
Call Option, Percentage, year three				101.188%	[1]				100.00%	[1]
Call Option, Percentage, year four				100.00%	[1]
Noes originally issued amount			325,000,000
Payments of issuance costs and expenses of related to notes			7,900,000
Repayments of senior debt												285,000,000
Payment for accrued interest related to senior notes												9,300,000
Payment for tender fees and inducement premium related to senior notes												20,500,000
Net cash proceeds from notes used for general corporate purposes			$ 2,300,000

[1] The Company may, at its option, redeem the Notes on or after the stated beginning dates at percentages noted above (plus interest due)