Annual report pursuant to Section 13 and 15(d)

Litigation and Related Matters (Details)

v3.7.0.1
Litigation and Related Matters (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Jul. 13, 2016
May 16, 2016
Jul. 06, 2015
Jul. 31, 2015
Dec. 31, 2013
Dec. 31, 2016
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]              
Environmental liabilities           $ 0.0 $ 0.0
Armstrong Kushan, multilayered wood flooring imports from China              
Loss Contingencies [Line Items]              
Countervailing duties rate   1.38%   0.99% 0.98%    
Antidumping duties rate 17.37%   3.31% 13.74% 0.00%    
Armstrong Kushan, multilayered wood flooring imports from China | Accounts payable and accrued expenses              
Loss Contingencies [Line Items]              
Estimated litigation liability       $ 4.6   $ 5.9