Long-term Debt Long-term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 838.7	$ 757.8
Unamortized Discount (Premium) and Debt Issuance Costs	(6.3)	(3.9)
Long-term Debt, Net	832.4	753.9
Long-term Debt, Current Maturities	(458.1)	(2.1)
Long-term Debt, Excluding Current Maturities	$ 374.3	751.8
Senior unsecured notes, maturing 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Long-term Debt, Gross	$ 87.6	350.0
Unamortized Discount (Premium) and Debt Issuance Costs	(0.7)	(3.7)
Long-term Debt, Net	86.9	346.3
Long-term Debt, Current Maturities	$ (86.9)
Senior unsecured notes, maturing 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.875%
Long-term Debt, Gross	$ 350.0
Unamortized Discount (Premium) and Debt Issuance Costs	(5.2)
Long-term Debt, Net	344.8
Chilean term credit facility, maturing 2019 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	7.0	12.8
Unamortized Discount (Premium) and Debt Issuance Costs	(0.3)
Long-term Debt, Net	$ 6.7	12.8
Brazilian export financing facility, maturing 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.70%
Long-term Debt, Gross	$ 2.0	4.0
Long-term Debt, Net	$ 2.0	4.0
Senior notes payable 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.30%
Long-term Debt, Gross	$ 22.0	22.0
Long-term Debt, Net	22.0	22.0
Non-recourse notes payable 2018 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	368.7	368.7
Unamortized Discount (Premium) and Debt Issuance Costs	(0.1)	(0.2)
Long-term Debt, Net	368.6	368.5
Long-term Debt, Current Maturities	(368.6)
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	1.4	0.3
Long-term Debt, Net	$ 1.4	$ 0.3

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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