| In millions, except per share items | Jun-30-21 | Dec-31-20 | Sep-30-20 | Sep-05-20 | Jun-30-20 | Jun-05-20 | Mar-31-20 | Dec-31-19 |
| | 10-Q | 10-K | 10-Q | 8-K | 10-Q | 8-K | 10-Q | 10-K |
| Net income | 5.8 | 0.3 | -11.7 | -11.7 | -5.9 | -5.9 | -56.4 | -70.5 |
| Depreciation and amortization | | 12.6 | 17.5 | 17.5 | 12.6 | 12.6 | 12.2 | 12.3 |
| Asset impairment charges | | | | | | | 61.1 | |
| Stock-based compensation | | 0.9 | 0.7 | | 0.9 | | 0.9 | 0.8 |
| Deferred taxes | | 2.5 | -0.9 | | -3.2 | | -2.9 | -1.7 |
| Change in working capital [+] | | -21.4 | 27.4 | | 10.2 | | 10.0 | 20.5 |
| Accounts receivable | | -3.4 | -11.4 | | 10.9 | | -7.8 | 26.9 |
| Inventories | | -6.2 | 10.5 | | 1.7 | | -2.0 | 8.8 |
| Accounts payable | | -2.2 | 20.0 | | -12.8 | | 21.1 | -13.8 |
| Other | | -9.6 | 8.3 | | 10.5 | | -1.3 | -1.5 |
| Other operating activities | 0.1 | 4.5 | 1.1 | 28.4 | -1.1 | 6.9 | 1.8 | 62.5 |
| Cash from operations | 5.9 | -0.4 | 34.2 | 34.2 | 13.7 | 13.7 | 26.7 | 23.9 |
| |
| Capital expenditures [+] | 0.0 | -12.9 | -5.1 | -5.1 | -6.3 | -6.3 | -9.2 | -8.6 |
| Purchases of property and equipment | | -12.9 | -5.1 | -5.1 | -6.3 | -6.3 | -9.2 | -8.6 |
| Sales of property and equipment | | 0.0 | 0.0 | | 0.0 | | | 0.0 |
| Other cash from investing | 29.3 | 1.5 | 0.9 | 0.9 | 1.7 | 1.7 | 1.7 | |
| Cash from investing | 29.3 | -11.4 | -4.2 | -4.2 | -4.6 | -4.6 | -7.5 | -8.6 |
| |
| Issuance of common stock, net | | 1.9 | 0.0 | | 0.0 | | 0.0 | 0.4 |
| Other cash from financing | | -12.7 | -2.8 | -2.8 | -4.9 | -4.9 | 18.4 | -14.0 |
| Cash from financing | 0.0 | -10.8 | -2.8 | -2.8 | -4.9 | -4.9 | 18.4 | -13.7 |
| |
| Free cash flow | 5.9 | -13.4 | 29.1 | 29.1 | 7.4 | 7.4 | 17.6 | 15.3 |
| Per share (diluted) | $0.33 | ($0.77) | $1.68 | $1.68 | $0.42 | $0.42 | $1.01 | $0.88 |
| |