Summary of Significant Accounting Policies Assets Held for Sale (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Assets Held For Sale Property Plant and Equipment Net	$ 9.0	$ 9.3
Capitalized Interest Costs, Including Allowance for Funds Used During Construction	(1.9)	(1.3)	$ (1.6)
Sales Price of held-for-sale assets		11.9
Land, land improvements and logging roads, net of road amortization [Member]
Property, Plant and Equipment [Line Items]
Assets Held For Sale Property Plant and Equipment Net	1.8	1.3
Building [Member]
Property, Plant and Equipment [Line Items]
Assets Held For Sale Property Plant and Equipment Net	0.5	0.3
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Assets Held For Sale Property Plant and Equipment Net	$ 6.7	$ 7.7