| 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 |
| General and administrative expenses | 6.7 | 6.6 | 6.5 | 7.0 | | | | 16.0 |
| |
| Recovery of affiliate doubtful receivable | | | | | | | | |
| Operating (loss) income | -0.9 | -6.6 | -6.5 | -7.0 | -6.7 | -6.5 | -5.3 | -16.0 |
| Interest and investment income | 1.1 | 5.7 | 4.7 | 2.5 | 0.2 | 0.1 | 0.6 | 1.2 |
| Interest expense | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Other expense | -10.9 | -4.6 | -3.4 | | | | | |
| (Loss) income before income taxes and equity in net (loss) income of affiliates | -10.7 | -5.5 | -5.3 | -8.8 | -8.0 | -10.2 | -8.0 | -15.5 |
| Income tax (provision) benefit | -12.9 | -6.2 | 39.3 | -73.1 | -28.5 | 45.5 | 8.1 | -1.8 |
| Tax rate | | | 748.2% | | | 446.4% | 100.9% | |
| Income (loss) before equity in net income (loss) of affiliates | -23.6 | -11.6 | | | | | | |
| Equity in net (loss) income of affiliates | 116.7 | 101.4 | -24.4 | 216.3 | 84.1 | -104.8 | -1.5 | 38.8 |
| Net (loss) income | 93.1 | 89.8 | 9.6 | 134.5 | 47.2 | -70.3 | -25.8 | 16.6 |
| |
| Other comprehensive income (loss), net of tax | | | | | | | | |
| Comprehensive (loss) income | | | | | | | -34.1 | 33.1 |
| |
| Net (loss) income per share: | | | | | | | | |
| Basic | $3.01 | $2.90 | $0.31 | $4.35 | $1.53 | ($2.28) | ($0.84) | $0.54 |
| Diluted | $2.98 | $2.88 | $0.31 | $4.30 | $1.49 | ($2.28) | ($0.84) | $0.51 |
| |
| Weighted average common shares outstanding: | | | | | | | | |
| Basic | 30.9 | 30.9 | 30.9 | 30.9 | 30.9 | 30.9 | 30.9 | 30.9 |
| Diluted | 31.0 | 31.0 | 31.0 | 31.0 | 31.0 | 30.9 | 30.9 | 31.0 |