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Restructuring and Impairment Activities (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense | $ 21.6 | $ 1.3 | $ 0.9 | $ 1.8 | $ 4.1 | $ 1.3 | $ 5.2 | $ 4.0 |  | $ 25.6 | $ 14.6 | $ 13.1
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | $ 7.7 |  |  |  | $ 8.7 | $ 8.7 | 7.7 | 8.7 |
Accruals for announced programs |  |  |  |  |  |  |  |  |  | 4.3 | 8.0 |
Cash payments |  |  |  |  |  |  |  |  |  | (8.4) | (8.3) |
Exchange rate impacts |  |  |  |  |  |  |  |  |  | 0.7 | (0.7) |
Balance at end of period | $ 4.3 |  |  |  | $ 7.7 |  |  |  |  | 4.3 | 7.7 | 8.7
Engineered Papers [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense |  |  |  |  |  |  |  |  | $ 14.4 | 4.0 |  | 11.3
Engineered Papers [Member] | Employee Severance [Member] | France, Brazil, And United States [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense |  |  |  |  |  |  |  |  |  | 3.4 | 7.8 | 9.4
Engineered Papers [Member] | Asset Impairment Charge [Member] | RTL facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense |  |  |  |  |  |  |  |  |  |  | 5.2 |
Engineered Papers [Member] | Asset Impairment Charge [Member] | Polish and Brazil [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense |  |  |  |  |  |  |  |  |  | 0.6 | 1.4 |
Engineered Papers [Member] | Asset Impairment Charge [Member] | Philippines [Member] | RTL facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense |  |  |  |  |  |  |  |  |  |  | 5.2 |
Engineered Papers [Member] | Facility Closing [Member] | Lee Mills And Golden Hills Manufacturing Facilities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense |  |  |  |  |  |  |  |  |  |  |  | 1.0
Engineered Papers [Member] | Other Restructuring [Member] | Canada Manufacturing Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense |  |  |  |  |  |  |  |  |  |  |  | 0.9
Advanced Materials & Structures [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense |  |  |  |  |  |  |  |  |  | 21.3 | (0.2) | 0.4
Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and impairment expense |  |  |  |  |  |  |  |  |  | 0.3 | $ 0.4 | $ 1.4
Trade names [Member] | Advanced Materials & Structures [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Intangible Assets, Finite-lived |  |  |  |  |  |  |  |  |  | $ 20.7 |  |

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