Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

	Interest Rate  2014		December 31,
Dollar amounts in millions			2014			2013
Debentures:
Senior unsecured notes, maturing 2020, interest rates fixed	7.5	%	$	350.0		$	350.0
Bank credit facilities:
Chilean term credit facility, maturing 2019, interest rates fixed	UF+3.9%		14.4			15.7
Brazilian export financing facility, maturing 2017, interest rates fixed	6.65	%	6.0			8.0
Limited recourse notes payable:
Senior notes, payable 2018, interest rates fixed	7.3	%	22.0			22.0
Other financing:
Non-recourse notes payable 2018, interest rates variable	0.2	%	368.7			368.7
Other			0.8			0.6
Total			761.9			765.0
Less: current portion			(2.4		)	(2.3		)
Net long-term portion			$	759.5		$	762.7

Schedule of Maturities of Long-term Debt [Table Text Block]

The weighted average interest rate for all long-term debt at December 31, 2014 and 2013 was approximately 3.9 percent for both periods. Required repayment of principal for long-term debt is as follows:

Dollar amounts in millions
Year ended December 31,
2015	$	2.4
2016	2.3
2017	6.8
2018	395.6
2019	4.8
2020 and after	350.0
Total	$	761.9