Overview Financials News + Filings Key Docs Charts Ownership Insiders
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| 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 |
| Assets |
| Cash and equivalents | 101.6 | 88.5 | 95.8 | 2.8 | 3.0 | 0.5 | 3.3 | 1,313.4 |
| Short-term investments | | | | | | 0.0 | 0.0 | 10.3 |
| Inventories | | | | | 0.1 | 0.2 | 0.0 | |
| Other current assets | 4.4 | 104.6 | 1.9 | 1.7 | 0.4 | 0.7 | 0.2 | 151.8 |
| Total current assets | 106.0 | 193.0 | 97.7 | 4.5 | 3.5 | 1.4 | 3.6 | 1,475.6 |
| Property, plant, and equipment, net | 106.3 | 33.8 | 26.9 | 25.1 | 23.7 | 21.8 | 1.7 | 741.3 |
| Intangibles | 0.2 | 0.2 | 0.2 | | 0.2 | 0.2 | 0.4 | 191.8 |
| Other fixed assets | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.2 | 0.0 | 21.6 |
| Total assets | 213.8 | 228.4 | 125.8 | 30.2 | 27.7 | 23.7 | 5.7 | 2,636.7 |
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| Accounts payable | | | | 0.8 | 0.4 | 1.1 | 0.2 | |
| Accrued expenses | 1.0 | 0.9 | 0.6 | 0.6 | 0.4 | 0.8 | 0.7 | |
| Current portion of long-term debt | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 |
| Current portion of long-term debt | | | | | 0.1 | 0.0 | 0.0 | |
| Other current liabilities | 14.4 | 5.0 | 1.5 | 0.3 | 0.1 | 0.8 | 0.1 | 621.9 |
| Total current liabilities | 15.4 | 5.9 | 2.1 | 1.7 | 0.9 | 2.7 | 1.0 | 621.9 |
| Long-term debt | | | | | 3.5 | 3.0 | 2.6 | 2,070.4 |
| Other liabilities | 6.5 | 8.7 | 8.8 | 4.8 | | | | |
| Total liabilities | 21.9 | 14.6 | 10.9 | 6.5 | 4.4 | 5.8 | 3.7 | 2,692.3 |
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| Shareholders' equity [+] | 191.9 | 213.8 | 114.9 | 23.8 | 23.2 | 18.0 | 2.0 | -55.6 |
| Paid-in capital | 385.4 | 384.9 | 263.6 | 156.2 | 142.7 | 126.7 | 101.6 | 90,968.8 |
| Retained earnings | -193.0 | -170.9 | -148.5 | -132.1 | -118.9 | -108.5 | -99.3 | -90,803.2 |
| Tangible shareholders' equity | 191.7 | 213.6 | 114.6 | 23.8 | 23.0 | 17.8 | 1.6 | -247.4 |
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