| In millions, except per share items | Jun-30-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | 6.1 | 8.0 | 8.7 | 8.5 | 8.2 | 9.1 | 8.3 | 6.4 |
| Depreciation and amortization | | 0.3 | 0.3 | 0.3 | 0.4 | 0.3 | 0.3 | 0.3 |
| Stock-based compensation | | 0.3 | 0.3 | 0.4 | 0.2 | 0.2 | 0.2 | 0.1 |
| Deferred taxes | | 3.1 | -1.1 | -0.9 | 0.1 | -2.7 | 0.5 | -0.2 |
| Change in working capital | | 124.9 | -94.0 | 30.6 | -32.9 | 43.0 | 16.3 | -0.8 |
| Other | | 124.9 | -94.0 | 30.6 | -32.9 | 43.0 | 16.3 | -0.8 |
| Other operating activities | -2.1 | -133.7 | 132.0 | -16.8 | 36.6 | -26.1 | -49.0 | -39.4 |
| Cash from operations | 4.0 | 3.0 | 46.2 | 22.0 | 12.6 | 23.9 | -23.4 | -33.5 |
| |
| Capital expenditures | 0.0 | -0.4 | -0.2 | -0.3 | -0.5 | -0.5 | -0.3 | -0.2 |
| Purchases of property and equipment | | -0.4 | -0.2 | -0.3 | -0.5 | -0.5 | -0.3 | -0.2 |
| Purchases of short-term investments, net | | -23.8 | -21.2 | -19.1 | -19.6 | -49.8 | 8.8 | -9.8 |
| Purchases of short-term investments | | -29.8 | -28.5 | -28.5 | -29.0 | -58.6 | | -19.9 |
| Sales of short-term investments | | 6.0 | 7.3 | 9.5 | 9.4 | 8.8 | 8.8 | 10.0 |
| Other cash from investing | | -60.8 | -133.6 | -68.0 | -114.4 | -82.5 | 13.6 | -97.4 |
| Cash from investing | 0.0 | -85.0 | -155.0 | -87.3 | -134.5 | -132.7 | 22.1 | -107.5 |
| |
| Cash dividends paid | | -1.8 | -1.8 | -1.5 | -1.5 | -1.5 | -1.5 | -1.1 |
| Option exercises | | 0.5 | 0.1 | | | | | 0.1 |
| Other cash from financing | | 60.0 | 85.3 | 69.5 | 137.9 | 37.7 | 62.3 | 143.4 |
| Cash from financing | 0.0 | 57.7 | 83.4 | 68.0 | 136.4 | 36.1 | 60.8 | 142.3 |
| |
| Free cash flow | 4.0 | 2.6 | 45.9 | 21.7 | 12.1 | 23.4 | -23.7 | -33.8 |
| Per share (diluted) | $0.26 | $0.17 | $3.01 | $1.43 | $0.79 | $1.55 | ($1.56) | ($2.23) |
| |
| Cash paid for interest | | 3.2 | 4.2 | 1.0 | 0.7 | 0.7 | 0.8 | 0.8 |