Assets Held for Sale (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Property, plant and equipment held for sale [Abstract]
Assets held-for-sale, property, plant and equipment	$ 166.2	$ 167.9
Assets held for sale acumulated depreciation	(134.8)	(135.4)
Assets Held For Sale Property Plant and Equipment Net	31.4	32.5
Land Land Improvements And Logging Roads Net of Road Amortization [Member]
Property, plant and equipment held for sale [Abstract]
Assets held-for-sale, property, plant and equipment	9.9	10.0
Building [Member]
Property, plant and equipment held for sale [Abstract]
Assets held-for-sale, property, plant and equipment	15.6	17.1
Machinery and Equipment [Member]
Property, plant and equipment held for sale [Abstract]
Assets held-for-sale, property, plant and equipment	$ 140.7	$ 140.8