| In millions, except per share items | Jun-30-23 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Net income | | 7.3 | 4.9 | 3.6 | 16.9 | 15.0 | 15.1 | 12.0 |
| Depreciation and amortization | | | | 0.9 | | | | 0.9 |
| Change in working capital | | -1.5 | 0.7 | 2.5 | 1.7 | 3.4 | 5.9 | 5.7 |
| Other | | -1.5 | 0.7 | 2.5 | 1.7 | 3.4 | 5.9 | 5.7 |
| Other operating activities | | 13.9 | 14.4 | 17.3 | 3.3 | 0.1 | -1.6 | -0.4 |
| Cash from operations | | 20.7 | 20.8 | 24.3 | 22.8 | 19.4 | 19.9 | 18.2 |
| |
| Capital expenditures | | 0.3 | 0.3 | 0.4 | 0.5 | 0.6 | 1.5 | 0.9 |
| Purchases of property and equipment | | 0.3 | 0.3 | 0.4 | 0.5 | 0.6 | 1.5 | 0.9 |
| Sales of short-term investments, net [+] | | 14.9 | 15.9 | 21.9 | 19.4 | 14.2 | 14.8 | 10.1 |
| Purchases of short-term investments | | | | 13.6 | 10.6 | | 5.0 | |
| Sales of short-term investments | | 6.4 | 7.3 | 8.3 | 8.8 | 9.2 | 9.8 | 10.1 |
| Other cash from investing | | -205.1 | -173.5 | -178.0 | -3.5 | -82.3 | -335.5 | -438.4 |
| Cash from investing | | -189.8 | -157.3 | -155.7 | 16.5 | -67.4 | -185.3 | -360.5 |
| |
| Repurchase of common stock, net | | -3.1 | -13.7 | -18.3 | -26.0 | -20.2 | -17.6 | -7.8 |
| Other cash from financing | | 186.7 | 233.4 | 219.1 | 130.4 | 170.4 | 281.5 | 374.3 |
| Cash from financing | | 183.5 | 219.7 | 200.7 | 104.5 | 150.2 | 263.9 | 366.4 |
| |
| Free cash flow | | 21.0 | 21.1 | 24.7 | 23.3 | 20.0 | 21.3 | 19.1 |
| Per share (diluted) | | $1.23 | $1.23 | $1.42 | $1.33 | $1.13 | $1.19 | $1.05 |
| |
| Cash paid for interest | | 2.1 | 2.6 | 3.1 | 3.8 | 4.2 | 4.9 | 5.9 |