Annual report pursuant to Section 13 and 15(d)

Other Severance Expense - Narrative (Details)

v3.8.0.1
Other Severance Expense - Narrative (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2017
employee
Dec. 31, 2017
USD ($)
employee
Dec. 31, 2016
USD ($)
position
Restructuring Cost and Reserve [Line Items]      
Number of positions eliminated   40 6
Wood Flooring      
Restructuring Cost and Reserve [Line Items]      
Number of positions eliminated | employee 300    
Selling, general and administrative expenses      
Restructuring Cost and Reserve [Line Items]      
Severance expenses   $ 4.6 $ 1.7
Selling, general and administrative expenses | Resilient Flooring      
Restructuring Cost and Reserve [Line Items]      
Severance expenses   2.7 1.0
Selling, general and administrative expenses | Wood Flooring      
Restructuring Cost and Reserve [Line Items]      
Severance expenses   $ 1.9 $ 0.7