Quarterly report pursuant to Section 13 or 15(d)

Litigation and Related Matters (Details)

v3.7.0.1
Litigation and Related Matters (Details) - USD ($)
$ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
May 15, 2017
Jul. 13, 2016
May 16, 2016
Jul. 31, 2015
Jun. 30, 2017
Dec. 31, 2013
Dec. 31, 2016
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 1.06%   1.38% 0.99%   0.98%  
Antidumping duties rate   17.37%   13.74% 3.31% 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