Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Long-term Debt (Details) $ in Millions	3 Months Ended	12 Months Ended
Long-term Debt (Details) $ in Millions	Dec. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CLP	Dec. 31, 2015 USD ($)	May 01, 2012
Notes and Loans Payable [Abstract]
Long-term Debt, Gross	$ 382.3	$ 382.3		$ 757.8
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	(5.3)	(5.3)		(3.9)
Long-term debt	377.0	377.0		753.9
Current portion of long-term debt	2.6	2.6		2.1
Long-term debt, excluding current portion	374.4	374.4		751.8
Senior unsecured notes, maturing 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 350.0	$ 350.0
Notes and Loans Payable [Abstract]
Debt, interest rate, stated percentage	4.90%	4.90%	4.90%		4.875%
Long-term Debt, Gross	$ 350.0	$ 350.0
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	(5.0)	(5.0)
Long-term debt	345.0	345.0
Senior unsecured notes, maturing 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 350.0	$ 350.0
Notes and Loans Payable [Abstract]
Debt, interest rate, stated percentage	7.50%	7.50%	7.50%		7.50%
Long-term Debt, Gross				350.0
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net				(3.7)
Long-term debt				346.3
Chilean term credit facility, maturing 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 39.0	$ 39.0	CLP 943,543.7391
Notes and Loans Payable [Abstract]
Debt, interest rate, stated percentage	3.90%	3.90%	3.90%
Long-term Debt, Gross	$ 7.0	$ 7.0		12.8
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	(0.3)	(0.3)		0.0
Long-term debt	$ 6.7	6.7		12.8
Repayments of Debt		$ 6.8
Brazilian export financing facility, maturing 2017 [Member]
Notes and Loans Payable [Abstract]
Debt, interest rate, stated percentage	6.65%	6.65%	6.65%
Long-term Debt, Gross	$ 2.0	$ 2.0		4.0
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	0.0	0.0		0.0
Long-term debt	2.0	2.0		4.0
Repayments of Debt		2.0
Senior notes payable 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 348.6	$ 348.6
Notes and Loans Payable [Abstract]
Debt, interest rate, stated percentage	7.30%	7.30%	7.30%
Long-term Debt, Gross	$ 22.0	$ 22.0		22.0
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	0.0	0.0		0.0
Long-term debt	22.0	22.0		22.0
Non-recourse notes payable 2018 (repaid 2016) [Member]
Notes and Loans Payable [Abstract]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net				(0.2)
Long-term debt				368.5
Repayments of Debt	368.7
Other Debt Obligations [Member]
Notes and Loans Payable [Abstract]
Long-term Debt, Gross	1.3	1.3		0.3
Long-term debt	$ 1.3	$ 1.3		$ 0.3