Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Identifiable intangibles
Gross Carrying Amount	$ 60.0	$ 60.0
Accumulated Amortization	(18.2)	(14.2)
Net	41.8us-gaap_FiniteLivedIntangibleAssetsNet	45.8us-gaap_FiniteLivedIntangibleAssetsNet
Amortization expense	4.0us-gaap_AmortizationOfIntangibleAssets	3.8us-gaap_AmortizationOfIntangibleAssets	3.8us-gaap_AmortizationOfIntangibleAssets
Customer relationships
Identifiable intangibles
Gross Carrying Amount	50.0	50.0
Accumulated Amortization	(13.2)	(10.4)
Net	36.8	39.6
TerraCair brand
Identifiable intangibles
Gross Carrying Amount	10.0	10.0
Accumulated Amortization	(5.0)	(3.8)
Net	$ 5.0	$ 6.2

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

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+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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