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Restructuring and Impairment Activities (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]          
Restructuring and impairment expense $ 1.5 $ 1.3 $ 4.2 $ 4.0  
Restructuring Reserve [Roll Forward]          
Balance at beginning of year     4.3 7.7 $ 7.7
Accruals for announced programs     3.4   4.3
Cash payments     (4.8)   (8.4)
Exchange rate impacts     0.4   0.7
Balance at end of period 3.3   3.3   $ 4.3
Corporate, Non-Segment [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring and impairment expense (0.1) 0.0 0.1 0.3  
Engineered Papers [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring and impairment expense 0.4 1.3 1.7 3.1  
Engineered Papers [Member] | Asset impairment [Member] | Poland Manufacturing [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring and impairment expense       0.5  
Engineered Papers [Member] | France, Brazil, And United States [Member] | Employee severance [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring and impairment expense     0.9 2.6  
Engineered Papers [Member] | PHILIPPINES | Asset impairment [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring and impairment expense 0.2   0.8    
Advanced Materials & Structures [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring and impairment expense $ 1.2 $ 0.0 $ 2.4 $ 0.6