Accounts and Notes Receivable and Credit Quality of Notes Receivable (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	$ 705.2us-gaap_NotesReceivableNet	$ 744.6us-gaap_NotesReceivableNet
Argentina
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	20.8
Proceeds from collection of accounts and notes receivable, net	7.5
Peru
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	41.1
Proceeds from collection of accounts and notes receivable, net	11.8
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable with imputed interest, effective yield (interest rate)	4.00%
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable with imputed interest, effective yield (interest rate)	10.40%
Notes receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable, net	$ 241.4	$ 276.2
Financing receivable, percentage greater than 90 days past due	4.70%	5.90%

Financing Receivable, Percentage Greater than 90 Days Past Due

No definition available.

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- Definition

Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

+ References

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 210.5-02.3)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Definition

The cash inflow associated with the collection of receivables arising from the financing of goods and services.

+ References

No definition available.

+ Details

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- Definition

Yield on the receivable, on which interest has been imputed, as calculated from its issuance value or purchase price. The calculated effective interest rate considers factors such as the issued face value or price paid for the receivable, the time period between payments, and the time until maturity [full receipt] of the receivable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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