Long-term Debt (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Notes and Loans Payable [Abstract]
Notes Payable	$ 97.9	$ 7.9
Other	0.3	0.4
Total	891.1	729.1
Less: current portion	(7.8)	(5.3)
Net long-term portion	785.4	715.9
Senior Secured Notes Maturing 2017 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	0	189.6
Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	389.8
Notes and Loans Payable [Abstract]
Notes Payable	350.0	0
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Chilian Term Credit Facility Maturing 2019 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	42.2	40.5
Brazilian export financing facility, maturing 2017 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	10.0	10.0
Senior Notes Payable 2012 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	7.9	7.9
Senior Notes Payable 2013 Thru 2018 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	112.0	112.0
Non Recourse Notes Payable 2018 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	368.7	368.7
Recourse and non recourse [Member]
Notes and Loans Payable [Abstract]
Less: current portion	$ (105.7)	$ (13.2)

Interest rate stated in the contractual debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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