Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 9.7us-gaap_Goodwill	$ 9.7us-gaap_Goodwill	$ 0us-gaap_Goodwill
Intangible Assets	64.9us-gaap_IntangibleAssetsCurrent	68.3us-gaap_IntangibleAssetsCurrent
Future Amortization Expense, Year One	3.3
Future Amortization Expense, Year Two	3.3
Future Amortization Expense, Year Three	4.1
Future Amortization Expense, Year Four	4.1
Future Amortization Expense, Year Five	4.1
Goodwill	0us-gaap_GoodwillAcquiredDuringPeriod	9.7us-gaap_GoodwillAcquiredDuringPeriod
Other Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets	0.1	0.1
Timber licenses
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets	64.8	68.2
Customer Relationships, Gross	$ 111.8

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Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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