| 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 | 10-K | 10-K | 10-K |
| Net income | -20.9 | -315.3 | -5.2 | 34.2 | 24.6 | 25.5 | 8.5 | 7.0 |
| Depreciation and amortization [+] | 16.4 | 14.9 | 23.8 | 26.4 | 25.7 | 24.5 | 20.7 | 14.3 |
| Depreciation | 16.4 | 14.9 | 23.8 | 26.4 | 25.7 | 24.5 | 20.7 | 14.3 |
| Asset impairment charges | 5.8 | 146.5 | | | | | | |
| Stock-based compensation | | | | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 |
| Deferred taxes | 4.1 | 0.3 | 0.4 | -1.8 | -0.5 | -0.2 | -2.9 | -4.1 |
| Change in working capital [+] | -3.7 | -3.6 | 3.2 | -2.9 | 2.7 | -0.7 | 0.5 | -22.0 |
| Accounts receivable | -0.1 | 0.4 | 0.9 | -1.3 | 0.8 | -0.7 | 1.9 | -21.0 |
| Inventories | -2.2 | | | | | | | |
| Other current assets | -1.0 | -1.4 | -0.1 | 0.1 | 0.0 | 0.3 | 0.0 | 0.1 |
| Deferred revenues | | | | | | | -0.7 | 0.7 |
| Income taxes | 3.2 | | | -2.2 | 2.2 | | | |
| Other | -3.6 | -2.6 | 2.4 | 0.6 | -0.2 | -0.3 | -0.6 | -1.8 |
| Other operating activities | 15.6 | 167.4 | 39.6 | -7.3 | 4.1 | 1.8 | 15.7 | |
| Cash from operations | 17.3 | 10.4 | 61.8 | 48.6 | 56.8 | 51.1 | 42.6 | 17.0 |
| |
| Capital expenditures [+] | -15.9 | -2.2 | -0.4 | -0.1 | -0.1 | -0.2 | -251.7 | -168.2 |
| Purchases of property and equipment | -15.9 | -2.2 | -0.4 | -0.1 | -0.1 | -0.2 | -251.7 | -168.2 |
| Sales of property and equipment | 0.1 | 0.0 | 0.0 | 0.0 | | 0.2 | | 0.0 |
| Acquisitions | -68.0 | | | | | | | |
| Other cash from investing | 0.2 | 0.0 | 5.1 | 56.9 | 7.7 | 0.4 | 7.0 | -8.9 |
| Cash from investing | -83.6 | -2.1 | 4.7 | 56.8 | 7.6 | 0.5 | -244.6 | -177.1 |
| |
| Cash dividends paid | -2.4 | -12.3 | -39.1 | -34.3 | -34.7 | -34.9 | -28.5 | -15.2 |
| Issuance of common stock, net | | | | | | -2.0 | 73.2 | 141.8 |
| Financing costs | -2.7 | | -0.4 | -0.3 | -1.5 | -0.2 | -1.6 | -3.3 |
| Other cash from financing | -21.1 | -17.2 | 23.8 | -17.9 | -23.2 | -21.6 | 162.8 | 19.8 |
| Cash from financing | -20.8 | -29.5 | -14.9 | -51.9 | -56.5 | -58.3 | 209.1 | 149.7 |
| |
| Free cash flow | 1.4 | 8.2 | 61.4 | 48.5 | 56.7 | 50.9 | -209.1 | -151.2 |
| Per share (diluted) | $0.10 | $0.60 | $4.71 | $3.15 | $4.76 | $4.28 | ($19.56) | ($22.90) |
| |
| Cash paid for interest | 11.2 | 9.3 | 6.8 | 11.2 | 10.8 | 12.9 | 7.9 | 2.8 |
| Cash paid for income taxes | -0.6 | -0.5 | 0.1 | 2.1 | 0.2 | 0.0 | 0.7 | 3.3 |