| 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 |
| Net income | 93.1 | 89.8 | 9.6 | 134.5 | 47.2 | -70.3 | -25.8 | 16.6 |
| Depreciation and amortization | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 |
| Deferred taxes | -11.4 | -3.0 | -9.0 | -80.2 | -29.5 | 39.7 | 10.3 | -28.2 |
| Change in working capital [+] | -0.4 | 8.0 | -37.9 | 111.4 | -8.1 | -12.6 | 7.4 | -43.4 |
| Income taxes | -1.0 | 4.5 | 12.3 | 120.4 | -4.6 | -0.5 | 13.1 | -12.0 |
| Other | 0.6 | 3.5 | -50.2 | -9.0 | -3.5 | -12.1 | -5.7 | -31.4 |
| Other operating activities | -92.2 | -94.4 | 39.1 | -187.6 | -19.2 | 27.2 | 5.7 | 33.4 |
| Cash from operations | -10.9 | 0.3 | 1.9 | -21.9 | -9.6 | -16.0 | -2.4 | -21.5 |
| |
| Capital expenditures | 0.0 | 0.0 | 0.0 | -0.1 | 0.0 | -0.1 | 0.0 | -0.1 |
| Purchases of property and equipment | | 0.0 | 0.0 | -0.1 | 0.0 | -0.1 | 0.0 | -0.1 |
| Sales of short-term investments | | | | | | | | 1.2 |
| Sales of short-term investments | | | | | | | | 1.2 |
| Other cash from investing | | | | 242.7 | | 33.7 | 72.8 | |
| Cash from investing | 0.0 | 0.0 | 0.0 | 242.7 | 0.0 | 33.6 | 72.8 | 1.1 |
| |
| Cash dividends paid | -216.5 | | | | | | | |
| Other cash from financing | | | | | -0.1 | 2.6 | 1.9 | -12.0 |
| Cash from financing | -216.5 | 0.0 | 0.0 | 0.0 | -0.1 | 2.6 | 1.9 | -12.0 |
| |
| Free cash flow | -10.9 | 0.3 | 1.9 | -21.9 | -9.6 | -16.1 | -2.4 | -21.6 |
| Per share (diluted) | ($0.35) | $0.01 | $0.06 | ($0.71) | ($0.31) | ($0.52) | ($0.08) | ($0.70) |