| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 8-K | 10-Q | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | 0.0 | 24.2 | 25.1 | 7.4 | 17.5 | -48.1 | 20.2 | 21.9 |
| Depreciation and amortization [+] | | | | | | 6.9 | | |
| Depreciation | | | | | | 6.9 | | |
| Stock-based compensation | | | | | | 5.8 | | |
| Deferred taxes | | | | | | -4.3 | | |
| Change in working capital | | | | | | -4.3 | | |
| Other | | | | | | -4.3 | | |
| Other operating activities | | -74.4 | | 245.1 | -44.6 | 4.3 | -3.3 | 173.9 |
| Cash from operations | | -50.3 | | 252.5 | -27.1 | -39.6 | 16.9 | 195.9 |
| |
| Capital expenditures [+] | | -0.7 | | -1.6 | -2.2 | -2.3 | -1.9 | -1.8 |
| Purchases of property and equipment | | -0.7 | | -1.6 | -2.2 | -2.3 | -1.9 | -1.8 |
| Sales of property and equipment | | 0.0 | | | 0.0 | 0.6 | 8.9 | 0.0 |
| Sales of short-term investments, net [+] | | 35.5 | | -21.9 | -6.6 | -15.7 | -52.9 | 64.8 |
| Purchases of short-term investments | | -26.2 | | -77.7 | -57.2 | -95.5 | -117.6 | -58.5 |
| Sales of short-term investments | | 61.7 | | 55.8 | 50.6 | 79.8 | 64.6 | 123.3 |
| Other cash from investing | | -37.4 | | -51.1 | -39.7 | -17.4 | -16.2 | -64.1 |
| Cash from investing | | -2.6 | | -74.6 | -48.4 | -34.8 | -62.1 | -1.1 |
| |
| Cash dividends paid | | -5.0 | | -4.9 | -5.0 | -9.1 | -5.0 | -5.0 |
| Repurchase of common stock, net | | | | -3.5 | -3.9 | | -1.4 | |
| Financing costs | | | | 0.0 | -0.1 | -3.4 | | |
| Other cash from financing | | -0.7 | | -0.4 | -0.8 | 92.6 | -0.4 | -0.7 |
| Cash from financing | | -5.7 | | -8.8 | -9.6 | 86.9 | -6.7 | -5.7 |
| |
| Free cash flow | | -50.9 | | 250.9 | -29.3 | -41.9 | 15.0 | 194.0 |
| Per share (diluted) | | ($1.66) | | $8.12 | ($0.94) | ($1.34) | $0.48 | $6.20 |
| |