Long-Term Debt (Convertible Notes) (Details) (USD $)	12 Months Ended		0 Months Ended	12 Months Ended	0 Months Ended
	Dec. 31, 2013 Subordinated Convertible Notes Due 2029 [Member]	Dec. 31, 2013 1.00% Senior Convertible Notes Due 2012 [Member]	Nov. 30, 2006 0.875% Convertible Notes Due 2013 [Member]	Dec. 31, 2013 0.875% Convertible Notes Due 2013 [Member]	Dec. 15, 2009 North America [Member] Subordinated Convertible Notes Due 2029 [Member]	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. 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]
Debt Instrument [Line Items]
Debt principal amount					$ 429,500,000.0					$ 355,000,000.0
Nonconvertible debt borrowing rate on debt instrument issuance date					12.50%					7.35%
Liability component of convertible notes					162,900,000	429,500,000	429,500,000	0	355,000,000	230,900,000
Unamortized discount					266,600,000	261,500,000	263,000,000	0	20,400,000	124,100,000
Debt issuance costs					$ 14,500,000
Interest rate								0.875%	0.875%	0.875%
Debt instrument original issuance date		Sep. 30, 2007	Nov. 30, 2006
Conversion price per share	$ 36.75			$ 50.36
Common stock covered under note hedges	11,686,075			7,048,880