| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | 22.6 | 19.8 | 33.6 | 28.7 | 29.1 | 15.9 | 22.2 | 22.3 |
| Depreciation and amortization [+] | 1.7 | 1.5 | 1.6 | 1.3 | 2.2 | 2.3 | 1.4 | 2.4 |
| Depreciation | 1.2 | 1.0 | 1.1 | 0.8 | 1.7 | 1.7 | 1.2 | 2.2 |
| Amortization of intangible assets | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | 0.2 | 0.2 |
| Asset impairment charges | | | 0.2 | | 0.1 | | | |
| Stock-based compensation | 1.2 | 1.7 | 2.0 | 1.2 | 1.2 | 1.4 | 0.9 | 1.0 |
| Deferred taxes | | | 2.7 | | | | 5.4 | |
| Change in working capital | 22.5 | -19.2 | -18.8 | 46.8 | 15.2 | -1.4 | -9.7 | -0.8 |
| Other | 22.5 | -19.2 | -18.8 | 46.8 | 15.2 | -1.4 | -9.7 | -0.8 |
| Other operating activities | -20.8 | 32.9 | 4.6 | -46.7 | -9.9 | 11.1 | 4.6 | -0.6 |
| Cash from operations | 27.3 | 36.8 | 26.0 | 31.4 | 38.0 | 29.3 | 24.7 | 24.2 |
| |
| Capital expenditures [+] | -1.5 | -2.0 | -2.7 | -1.1 | -1.7 | -0.9 | -1.4 | -0.8 |
| Purchases of property and equipment | -1.5 | -2.0 | -2.7 | -1.1 | -1.7 | -0.9 | -1.4 | -0.8 |
| Sales of property and equipment | | | | | 0.5 | 0.1 | -0.4 | 0.6 |
| Acquisitions | | | -0.1 | | | | | |
| Purchases of short-term investments, net | 27.1 | 28.2 | 161.2 | 40.4 | -40.5 | -185.2 | -245.8 | 53.3 |
| Purchases of short-term investments | | | | -4.8 | -39.0 | -269.1 | -282.2 | -69.7 |
| Sales of short-term investments | 27.1 | 28.2 | 161.2 | 45.3 | -1.5 | 83.9 | 36.5 | 123.0 |
| Other cash from investing | -131.9 | -67.0 | -444.6 | -162.6 | -245.1 | 230.4 | -225.8 | -83.1 |
| Cash from investing | -106.3 | -40.8 | -286.2 | -123.2 | -286.9 | 44.4 | -473.4 | -30.0 |
| |
| Cash dividends paid | -9.5 | -9.5 | -9.5 | -9.5 | -9.5 | -8.8 | -6.9 | -7.0 |
| Other cash from financing | 33.1 | 52.6 | 259.9 | 101.6 | 82.3 | 128.2 | 21.5 | 300.0 |
| Cash from financing | 23.6 | 43.1 | 250.4 | 92.1 | 72.8 | 119.4 | 14.6 | 293.0 |
| |
| Free cash flow | 25.8 | 34.7 | 23.3 | 30.3 | 36.3 | 28.4 | 23.3 | 23.5 |
| Per share (diluted) | $0.40 | $0.53 | $0.36 | $0.47 | $0.56 | $0.44 | $0.46 | $0.46 |
| |
| Cash paid for interest | 44.8 | 37.4 | 23.9 | 15.7 | 5.5 | 7.0 | 3.8 | 6.4 |