Quarterly report pursuant to Section 13 or 15(d)

Litigation and Related Matters (Details)

v3.4.0.3
Litigation and Related Matters (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jul. 09, 2015
Jul. 07, 2015
Jul. 06, 2015
Mar. 31, 2016
Dec. 31, 2013
Dec. 31, 2015
Loss Contingencies [Line Items]            
Environmental liabilities       $ 0.0   $ 0.0
Armstrong Kushan, multilayered wood flooring imports from China            
Loss Contingencies [Line Items]            
Antidumping duties rate 13.74%   3.31% 13.34% 0.00%  
Countervailing duties rate   0.99%   1.43% 0.98%  
Accounts payable and accrued expenses | Armstrong Kushan, multilayered wood flooring imports from China            
Loss Contingencies [Line Items]            
Estimated litigation liability $ 4.5