Goodwill and Other Intangible Assets Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 2.9
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	34.1
Finite-Lived Intangible Assets, Amortization Expense, Year Two	2.9
Finite-Lived Intangible Assets, Amortization Expense, Year Three	3.6
Finite-Lived Intangible Assets, Amortization Expense, Year Four	3.6
Finite-Lived Intangible Assets, Amortization Expense, Year Five	3.6
Finite-Lived Intangible Assets, Net	70.2	37.2
Timber Licenses [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	69.9	36.6
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	0.2	0.5
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	$ 0.1	$ 0.1