| In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| | 10-K | 10-K | 10-K | 10-K | 10-K/A | 10-K | 10-K | 10-K |
| Revenues: |
| Mineral Fiber | | | | 801.6 | 756.4 | | | |
| Architectural Specialties | | | | 173.7 | 137.2 | | | |
| Total revenues | 1,106.6 | 936.9 | 1,038.1 | 975.3 | 893.6 | 1,085.4 | 805.1 | 1,294.3 |
| Revenue growth [+] | 18.1% | -9.7% | 6.4% | 9.1% | -17.7% | 34.8% | -37.8% | -48.8% |
| Mineral Fiber | | | | 6.0% | | | | |
| Architectural Specialties | | | | 26.6% | | | | |
| Cost of goods sold | 1,023.8 | 860.0 | 893.1 | 872.0 | 821.3 | 778.4 | 795.8 | 1,324.4 |
| Gross profit | 82.8 | 76.9 | 145.0 | 103.3 | 72.3 | 307.0 | 9.3 | -30.1 |
| Gross margin | 7.5% | 8.2% | 14.0% | 10.6% | 8.1% | 28.3% | 1.2% | -2.3% |
| Selling, general and administrative [+] | 288.1 | 232.7 | 223.7 | 378.5 | 353.6 | 384.7 | 384.7 | 272.0 |
| Sales and marketing | | | | 159.0 | 138.6 | 205.6 | | |
| General and administrative | 288.1 | 232.7 | 223.7 | 219.5 | 215.0 | 179.1 | | |
| Other selling, general and administrative | | | | 159.0 | 138.6 | 205.6 | | |
| Equity in earnings | | | | -74.9 | -67.0 | -73.1 | -66.1 | -65.1 |
| Other operating expenses | -444.8 | -30.1 | -380.6 | -524.6 | -525.1 | -273.6 | -566.7 | -500.2 |
| EBITDA [+] | 336.0 | -41.7 | 374.0 | 328.8 | 333.0 | 285.1 | 309.6 | 327.5 |
| EBITDA growth | -905.8% | -111.1% | 13.7% | -1.3% | 16.8% | -7.9% | -5.5% | -12.6% |
| EBITDA margin | 30.4% | -4.5% | 36.0% | 33.7% | 37.3% | 26.3% | 38.5% | 25.3% |
| Depreciation | 62.7 | 61.9 | 52.2 | 64.3 | 74.6 | 75.3 | 104.3 | 115.4 |
| EBITA | 273.3 | -103.6 | 321.8 | 264.5 | 258.4 | 209.8 | 205.3 | 212.1 |
| EBITA margin | 24.7% | -11.1% | 31.0% | 27.1% | 28.9% | 19.3% | 25.5% | 16.4% |
| Amortization of intangibles | 33.8 | 22.1 | 19.9 | 15.1 | 14.6 | 13.9 | 14.0 | 14.0 |
| EBIT [+] | 239.5 | -125.7 | 301.9 | 249.4 | 243.8 | 195.9 | 191.3 | 198.1 |
| EBIT growth | -290.5% | -141.6% | 21.1% | 2.3% | 24.5% | 2.4% | -3.4% | -25.4% |
| EBIT margin | 21.6% | -13.4% | 29.1% | 25.6% | 27.3% | 18.0% | 23.8% | 15.3% |
| Non-recurring items | -4.1 | 0.1 | | | | | 34.3 | |
| Interest expense, net [+] | | | | 39.2 | 35.4 | 49.5 | 44.6 | 43.9 |
| Interest expense | | | | 39.2 | 35.4 | 49.5 | 44.6 | 46.0 |
| Interest income | | | | | | | | 2.1 |
| Other income (expense), net [+] | -0.9 | -0.9 | -2.5 | 32.5 | 13.7 | 4.2 | -17.8 | -5.8 |
| Other non-operating income | | | | | | | | -2.2 |
| Other non-ooperating expenses | | | | | | | | 5.9 |
| Other | -0.9 | -0.9 | -2.5 | 32.5 | 13.7 | | | 3.7 |
| Pre-tax income | 242.7 | -126.7 | 299.4 | 242.7 | 222.1 | 150.6 | 94.6 | 148.4 |
| Income taxes | 57.4 | -42.6 | 57.1 | 53.1 | 1.5 | 51.3 | 36.7 | 69.3 |
| Tax rate | 23.7% | 33.6% | 19.1% | 21.9% | 0.7% | 34.1% | 38.8% | 46.7% |
| Earnings from continuing ops | 185.3 | -84.1 | 242.3 | 189.6 | 220.6 | 99.3 | 57.9 | 79.1 |
| Earnings from discontinued ops | -2.1 | -15.0 | -27.8 | -17.0 | -206.2 | 20.7 | 77.9 | -15.3 |
| Net income | 183.2 | -99.1 | 214.5 | 185.9 | 119.6 | 104.7 | 94.2 | 63.8 |
| Net margin | 16.6% | -10.6% | 20.7% | 19.1% | 13.4% | 9.6% | 11.7% | 4.9% |
| |
| Basic EPS [+] | $3.89 | ($1.76) | $4.98 | $3.70 | $4.14 | $1.79 | $1.04 | $1.44 |
| Growth | -321.7% | -135.3% | 34.6% | -10.7% | 130.9% | 71.8% | -27.5% | -48.2% |
| Diluted EPS [+] | $3.87 | ($1.76) | $4.89 | $3.64 | $4.09 | $1.78 | $1.04 | $1.43 |
| Growth | -320.3% | -135.9% | 34.5% | -11.1% | 129.6% | 72.1% | -27.5% | -48.0% |
| |
| Dividends per share [+] | $0.86 | $0.81 | $0.73 | $0.18 | | | $0.02 | $0.02 |
| Growth | 6.3% | 11.7% | 314.3% | | | -100.0% | -8.5% | -2.4% |
| |
| Shares outstanding (basic) [+] | 47.6 | 47.9 | 48.7 | 51.3 | 53.3 | 55.4 | 55.5 | 55.0 |
| Growth | -0.6% | -1.6% | -5.1% | -3.8% | -3.8% | -0.2% | 0.9% | -4.8% |
| Shares outstanding (diluted) [+] | 47.9 | 47.9 | 49.5 | 52.1 | 53.9 | 55.7 | 55.9 | 55.4 |
| Growth | 0.0% | -3.2% | -5.0% | -3.3% | -3.2% | -0.4% | 0.9% | -5.1% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |