Legal Proceedings (Details) $ in Millions	12 Months Ended
Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Loss contingencies
Number of sites for state law proceedings under environmental matters	17
Number of sites for proceedings under environmental matters in Brazil	1
Accrual for Environmental Loss Contingencies	$ 0.9	$ 3.5
TaxAssessmentForGoodwillAmortization	11.5
Brazil Investigation [Member]
Loss contingencies
Loss Contingency, Estimate of Possible Loss	$ 60.0

Number of Sites for Proceedings under Environmental Matters in Brazil

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Represents the number of sites for state law proceedings under environmental matters.

+ References

No definition available.

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TaxAssessmentForGoodwillAmortization

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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-Section 50
-Paragraph 9
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-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

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