Segment Information Identifiable assets (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets	$ 2,176.3	$ 2,348.8
OSB
Assets	596.9	675.8
Siding
Assets	316.3	205.5
Engineered Wood Products
Assets	119.6	130.5
South America
Assets	92.7	126.8
Other
Assets	40.4	41.2
Unallocated Amount to Segment
Assets	$ 1,010.4	$ 1,169.0