Long-Term Debt (Subordinated Convertible Notes) (Details) (North America [Member], Subordinated Convertible Notes Due 2029 [Member], USD $)	0 Months Ended
	Dec. 15, 2009	Dec. 31, 2014	Dec. 31, 2013
North America [Member] | Subordinated Convertible Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt principal amount	$ 429,500,000.0
Nonconvertible debt borrowing rate on debt instrument issuance date	12.50%
Liability component of convertible notes	162,900,000	429,500,000	429,500,000
Unamortized discount	266,600,000	259,700,000	261,500,000
Debt issuance costs	$ 14,500,000