Inventories (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Finished products	$ 148.5	$ 142.7
Supplies	14.3	12.8
LIFO reserve	(1.0)	(1.0)
Total	225.0	209.8
Logs [Member]
Inventory Disclosure [Abstract]
Logs	42.9	37.6
Other Raw Materials [Member]
Inventory Disclosure [Abstract]
Logs	$ 20.3	$ 17.7