Product Warranty (Details) CAD in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CAD	Dec. 31, 2015 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2002 CAD
Product Liability Contingency [Line Items]
Indemnity | CAD					CAD 5.0			CAD 15.0
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance	$ 21.0	$ 31.4
Product Warranty Accrual, Warranties Issued	0.8	0.7	$ 0.6
Adjustment related to product related warranty reserves	16.9	(1.4)	(11.3)
Product Warranty Accrual, Discontinued Operations	(0.5)	(2.5)	(3.0)
Product Warranty Accrual, Currency Translation, Increase (Decrease)	(0.2)	(0.5)	(1.2)
Product Warranty Accrual, Payments	(14.9)	(11.7)	(11.6)
Ending Balance	21.0	31.4	31.4	$ 24.1		$ 21.0	$ 29.3
Current portion of warranty reserves			(12.0)	(9.0)		(6.0)
Long-term portion of warranty reserves			19.4	$ 15.1		$ 15.0
decking [Member]
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Product Warranty Accrual, Warranties Issued	$ 0.5	2.5
Damages from Product Defects [Member]
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Product Warranty Accrual, Discontinued Operations		$ 3.2	$ (3.0)