| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues | 764.7 | 868.1 | 764.3 | 854.8 | 826.9 | 744.2 | 755.7 | 753.6 |
| Revenues growth | -11.9% | 13.6% | -10.6% | 3.4% | 11.1% | -1.5% | 0.3% | -17.6% |
| Cost of goods sold | 456.2 | 508.6 | 490.8 | 525.1 | 503.9 | 452.8 | 458.2 | 465.8 |
| Gross profit | 276.3 | 359.5 | 271.2 | 328.0 | 322.6 | 286.0 | 295.7 | 281.8 |
| Gross margin | 36.1% | 41.4% | 35.5% | 38.4% | 39.0% | 38.4% | 39.1% | 37.4% |
| Research and development expenses | 81.7 | 92.8 | 92.9 | 96.8 | 100.6 | 93.4 | 92.0 | 83.2 |
| Selling and administrative expenses | 128.9 | 146.4 | 131.5 | 145.7 | 142.5 | 126.6 | 149.9 | 149.7 |
| Restructuring charges | 9.6 | 0.5 | 10.0 | 4.3 | 1.7 | 6.2 | 8.6 | 11.6 |
| Operating expenses | 691.1 | 243.7 | 242.0 | 246.8 | 244.8 | 246.1 | 250.7 | 496.9 |
| Operating earnings (loss) | -414.8 | 115.8 | 29.2 | 81.2 | 77.8 | 39.9 | 45.0 | 35.0 |
| Operating margin | -54.2% | 13.3% | 3.8% | 9.5% | 9.4% | 5.4% | 6.0% | 4.6% |
| Other (income) expense, net | -0.5 | -3.0 | 1.5 | 0.4 | 0.7 | -0.1 | -3.5 | 1.7 |
| Earnings (loss) before income taxes | -418.2 | 104.6 | 11.3 | 66.3 | 61.1 | 19.4 | 28.1 | 20.6 |
| Provision for income taxes | 11.9 | -45.6 | 8.4 | 16.6 | -4.5 | 12.9 | 8.3 | 3.2 |
| Net earnings (loss) | -430.1 | 150.4 | 6.6 | 49.1 | 67.7 | 68.3 | -42.3 | -233.8 |
| |
| Earnings per share: | | | | | | | | |
| Net earnings (loss) per share, basic | ($4.69) | $1.63 | $0.07 | $0.54 | $0.75 | $0.76 | ($0.48) | ($2.69) |
| Net earnings (loss) per share, diluted | ($4.69) | $1.59 | $0.07 | $0.53 | $0.74 | $0.75 | ($0.47) | ($2.69) |
| |
| Weighted-average common shares outstanding: | | | | | | | | |
| Basic (in shares) | 91.7 | 92.3 | 91.7 | 91.2 | 90.1 | 89.3 | 88.7 | 86.8 |
| Diluted (in shares) | 91.7 | 94.7 | 92.9 | 93.4 | 91.2 | 90.5 | 89.2 | 87.0 |
| Restructuring charges - cost of goods sold | 32.2 | | 2.3 | | | | | |
| Asset Impairment Charges | 470.9 | 4.0 | 7.6 | | | 19.9 | 0.5 | 5.6 |
| Interest Income (Expense), Net | -3.9 | -14.2 | -16.4 | -14.5 | -16.0 | -20.6 | -20.4 | -12.7 |