| In millions, except per share items | Jun-30-23 | Mar-31-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q |
| Net income | 32.7 | 24.3 | 27.4 | 22.7 | 21.3 | 22.7 | 22.1 | 19.8 |
| Depreciation and amortization [+] | 1.1 | 1.2 | 1.3 | 1.3 | 1.4 | 1.5 | 1.5 | 1.4 |
| Depreciation | 1.1 | 1.2 | 1.3 | 1.3 | 1.4 | 1.5 | 1.5 | 1.4 |
| Stock-based compensation | 0.6 | 1.1 | 0.8 | 0.7 | 1.0 | 0.7 | 0.6 | 1.2 |
| Deferred taxes | -0.2 | -0.7 | 0.5 | -0.2 | 0.9 | -0.1 | 1.5 | 0.4 |
| Change in working capital | -13.5 | 7.4 | 3.4 | -0.2 | 4.3 | 4.3 | 8.4 | -4.7 |
| Other | -13.5 | 7.4 | 3.4 | -0.2 | 4.3 | 4.3 | 8.4 | -4.7 |
| Other operating activities | 6.6 | 6.6 | 2.9 | -7.3 | -0.4 | 4.3 | -13.2 | 1.3 |
| Cash from operations | 27.4 | 39.9 | 36.4 | 16.9 | 28.5 | 33.4 | 20.9 | 19.4 |
| |
| Capital expenditures [+] | -1.1 | -0.6 | -0.6 | -0.6 | -0.4 | -0.4 | -1.5 | -1.0 |
| Purchases of property and equipment | -1.1 | -0.6 | -0.6 | -0.6 | -0.4 | -0.4 | -1.5 | -1.0 |
| Sales of property and equipment | 0.3 | | 0.1 | | 0.1 | 0.0 | 0.4 | |
| Purchases of short-term investments, net | 59.3 | 111.8 | 172.2 | 266.8 | 227.4 | 199.2 | 337.2 | 115.8 |
| Purchases of short-term investments | 21.8 | | 125.6 | 204.9 | 157.9 | 122.1 | 250.1 | 66.4 |
| Sales of short-term investments | 37.5 | 111.8 | 46.6 | 61.8 | 69.5 | 77.0 | 87.2 | 49.4 |
| Other cash from investing | -80.1 | 18.2 | -315.2 | -416.2 | -329.4 | -236.2 | -480.5 | -56.1 |
| Cash from investing | -21.7 | 129.4 | -143.6 | -150.0 | -102.4 | -37.4 | -144.4 | 58.7 |
| |
| Cash dividends paid | -10.0 | -9.6 | -8.9 | -9.1 | -9.0 | -9.0 | -9.1 | -9.2 |
| Repurchase of common stock, net | -24.0 | -20.1 | -0.7 | -16.3 | -3.0 | -25.5 | -17.1 | -5.8 |
| Option exercises | | | 0.0 | 0.7 | | 0.1 | 0.2 | 0.4 |
| Other cash from financing | -43.3 | -36.7 | -281.8 | 258.1 | 49.4 | 68.3 | 2.9 | 165.5 |
| Cash from financing | -77.3 | -66.4 | -291.4 | 232.0 | 37.3 | 33.7 | -23.4 | 150.1 |
| |
| Free cash flow | 26.3 | 39.3 | 35.7 | 16.3 | 28.1 | 33.0 | 19.4 | 18.4 |
| Per share (diluted) | $1.75 | $2.65 | $2.42 | $1.09 | $1.87 | $2.16 | $1.24 | $1.17 |
| |
| Cash paid for interest | 10.8 | 7.7 | 2.0 | 1.5 | 1.8 | 2.3 | 3.0 | 3.9 |