Severance And Related Costs (Details) $ in Millions	3 Months Ended				12 Months Ended
	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2013 USD ($) employee	Dec. 31, 2015 USD ($) employee
Unallocated Corporate [Member]
Severance and Related Costs [Line Items]
Severance and related costs					$ 5.3
Positions eliminated | employee					25
Pacific Rim [Member] | Building Products [Member]
Severance and Related Costs [Line Items]
Positions eliminated | employee					85
Pacific Rim [Member] | Building Products [Member] | Cost Of Goods Sold [Member]
Severance and Related Costs [Line Items]
Severance and related costs					$ 2.0
Pacific Rim [Member] | Building Products [Member] | SG&A Expense [Member]
Severance and Related Costs [Line Items]
Severance and related costs					$ 0.9
Europe [Member] | Building Products [Member]
Severance and Related Costs [Line Items]
Positions eliminated | employee					30
Europe [Member] | Building Products [Member] | SG&A Expense [Member]
Severance and Related Costs [Line Items]
Severance and related costs					$ 2.2
Australia [Member] | Resilient Flooring [Member]
Severance and Related Costs [Line Items]
Positions eliminated | employee				40
Australia [Member] | Resilient Flooring [Member] | Cost Of Goods Sold [Member]
Severance and Related Costs [Line Items]
Severance and related costs	$ 0.2	$ 1.7	$ 1.4	$ 2.4
China [Member] | Wood Flooring [Member] | Cost Of Goods Sold [Member]
Severance and Related Costs [Line Items]
Severance and related costs	$ 0.7	$ 1.4