Long-Term Debt (Schedule Of Convertible Debt Instruments Outstanding) (Details) (USD $) In Millions, unless otherwise specified			12 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 North America [Member] Subordinated Convertible Notes Due 2029 [Member]	Dec. 31, 2012 North America [Member] Subordinated Convertible Notes Due 2029 [Member]	Dec. 15, 2009 North America [Member] Subordinated Convertible Notes Due 2029 [Member]	Dec. 31, 2013 North America [Member] 4.50% Annual Interest Rate On Subordinated Convertible Notes Until November 2019 [Member]	Dec. 31, 2012 North America [Member] 4.50% Annual Interest Rate On Subordinated Convertible Notes Until November 2019 [Member]	Dec. 31, 2013 North America [Member] 2.25% Annual Interest Rate On Subordinated Convertible Notes Until November 2029 [Member]	Dec. 31, 2012 North America [Member] 2.25% Annual Interest Rate On Subordinated Convertible Notes Until November 2029 [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]
Face value			$ 429.5	$ 429.5	$ 162.9					$ 0	$ 355.0	$ 230.9
Debt discount			(261.5)	(263.0)	(266.6)					0	(20.4)	(124.1)
Total debt	1,386.9	1,450.1	168.0	166.5						0	334.6
Fair value			$ 462.8	$ 464.1						$ 0	$ 349.7
Maturity date			November 2029	November 2029		November 2019	November 2019	November 2029	November 2029	November 2013	November 2013
Interest rate						4.50%	4.50%	2.25%	2.25%	0.875%	0.875%	0.875%
Interest payments			Semi-annually: May 15 & Nov 15	Semi-annually: May 15 & Nov 15						Semi-annually: May 15 & Nov 15	Semi-annually: May 15 & Nov 15