| In millions, except per share items | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues |
| Thermal Acoustical Solutions | 294.8 | 361.6 | 365.4 | 342.1 | 321.2 | | | |
| Technical Nonwovens | 222.3 | 255.3 | 277.1 | 269.1 | 155.5 | 139.1 | 112.2 | |
| Performance Materials | 264.6 | 245.5 | 169.2 | 116.7 | 111.1 | 101.5 | 115.9 | 112.0 |
| Other Products & Services | | | | | | 1.7 | 19.7 | 17.2 |
| Thermal/Acoustical Metals | | | | | | 160.9 | 164.3 | 158.4 |
| Thermal/Acoustical Fibers | | | | | | 138.7 | 128.6 | 114.3 |
| Eliminations and Other | -17.8 | -25.0 | -25.8 | -29.4 | -21.0 | -17.5 | -4.8 | |
| |
| EBITDA |
| Thermal Acoustical Solutions | 11.8 | 33.8 | 47.3 | 61.8 | 60.7 | | | |
| Technical Nonwovens | 34.9 | 40.7 | 40.8 | 38.7 | 22.4 | 18.4 | 10.9 | |
| Performance Materials | -1.1 | -18.5 | 25.6 | 16.3 | 16.6 | 11.3 | 14.4 | 14.1 |
| Other Products & Services | | | | | | 0.2 | 2.4 | 1.4 |
| Thermal/Acoustical Metals | | | | | | 19.8 | 18.4 | 18.9 |
| Thermal/Acoustical Fibers | | | | | | 39.5 | 31.3 | 23.7 |
| |
| EBIT |
| Thermal Acoustical Solutions | -0.9 | 23.6 | 38.1 | 53.1 | 53.1 | | | |
| Technical Nonwovens | 18.6 | 22.9 | 21.3 | 26.0 | 15.6 | 13.4 | 6.4 | |
| Performance Materials | -46.0 | -59.8 | 13.1 | 12.3 | 12.6 | 6.8 | 9.7 | 9.5 |
| Other Products & Services | | | | | | 0.1 | 1.6 | 0.8 |
| Thermal/Acoustical Metals | | | | | | 15.5 | 13.8 | 14.1 |
| Thermal/Acoustical Fibers | | | | | | 37.1 | 29.2 | 21.5 |
| |
| Mix |
| Thermal Acoustical Solutions | 38.6% | 43.2% | 46.5% | 49.0% | 56.7% | | | |
| Technical Nonwovens | 29.1% | 30.5% | 35.3% | 38.5% | 27.4% | 26.5% | 20.9% | |
| Performance Materials | 34.6% | 29.3% | 21.5% | 16.7% | 19.6% | 19.3% | 21.6% | 28.1% |
| Other Products & Services | | | | | | 0.3% | 3.7% | 4.3% |
| Thermal/Acoustical Metals | | | | | | 30.7% | 30.7% | 39.8% |
| Thermal/Acoustical Fibers | | | | | | 26.5% | 24.0% | 28.7% |
| Eliminations and Other | -2.3% | -3.0% | -3.3% | -4.2% | -3.7% | -3.3% | -0.9% | |
| |
| Growth |
| Thermal Acoustical Solutions | -18.5% | -1.1% | 6.8% | 6.5% | | | | |
| Technical Nonwovens | -12.9% | -7.8% | 3.0% | 73.0% | 11.8% | 24.0% | | |
| Performance Materials | 7.8% | 45.1% | 45.0% | 5.0% | 9.5% | -12.4% | 3.5% | -5.1% |
| Other Products & Services | | | | | | -91.5% | 14.6% | 1.9% |
| Thermal/Acoustical Metals | | | | | | -2.0% | 3.7% | |
| Thermal/Acoustical Fibers | | | | | | 7.9% | 12.5% | 21.1% |
| Eliminations and Other | -29.0% | -3.1% | -12.2% | 40.2% | 20.1% | 264.0% | | |