| In millions, except per share items | Jun-30-23 | Mar-31-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | 35.3 | 36.4 | 31.8 | 19.3 | 35.2 | 48.8 | 45.3 | 43.3 |
| Depreciation and amortization [+] | 2.5 | 2.2 | 2.1 | 2.0 | 2.0 | 2.1 | 2.1 | 2.1 |
| Amortization of intangible assets | 0.9 | 1.0 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 |
| Stock-based compensation | 3.2 | 2.3 | 2.5 | 3.0 | 2.6 | 2.2 | 2.9 | 2.5 |
| Deferred taxes | 1.2 | 1.4 | 3.4 | 3.1 | 9.3 | 9.9 | 7.4 | 3.9 |
| Change in working capital [+] | 47.8 | -48.1 | 44.3 | -6.6 | 13.9 | -53.2 | 45.5 | -50.7 |
| Accrued expenses | 47.8 | -48.1 | 44.3 | -6.6 | 13.9 | -53.2 | 45.5 | -50.7 |
| Other operating activities | -81.8 | 104.2 | 131.1 | 219.4 | 225.2 | 86.1 | -69.1 | 96.0 |
| Cash from operations | 8.2 | 98.4 | 215.3 | 240.3 | 288.2 | 95.9 | 34.1 | 97.1 |
| |
| Capital expenditures [+] | -3.1 | -9.5 | -2.8 | -2.6 | -0.6 | -0.9 | -4.0 | 0.9 |
| Purchases of property and equipment | -3.1 | -9.5 | -2.8 | -2.6 | -0.6 | -0.9 | -4.0 | 0.9 |
| Sales of property and equipment | | | | 0.9 | | | | |
| Purchases of short-term investments, net | 31.3 | 26.2 | 44.9 | -1.8 | -112.7 | -112.5 | -205.1 | -136.6 |
| Purchases of short-term investments | -0.2 | -0.7 | 0.6 | -73.1 | -170.1 | -201.6 | -290.9 | -223.5 |
| Sales of short-term investments | 31.6 | 26.8 | 44.4 | 71.3 | 57.4 | 89.1 | 85.8 | 86.9 |
| Other cash from investing | 43.7 | -35.0 | -510.1 | -629.1 | -364.5 | -260.9 | -60.5 | -84.8 |
| Cash from investing | 71.9 | -18.3 | -468.0 | -632.6 | -477.8 | -374.3 | -269.6 | -220.5 |
| |
| Cash dividends paid | -7.0 | -7.0 | -6.0 | -6.1 | -6.2 | -5.3 | -5.1 | -5.2 |
| Repurchase of common stock, net | | -4.6 | 0.5 | -26.5 | -5.5 | -7.2 | 0.2 | |
| Other cash from financing | -232.7 | 224.4 | 3.6 | -445.5 | 146.8 | 763.9 | -152.1 | -49.4 |
| Cash from financing | -239.8 | 212.8 | -1.9 | -478.2 | 135.1 | 751.5 | -157.0 | -54.6 |
| |
| Free cash flow | 5.1 | 88.9 | 212.4 | 237.7 | 287.6 | 95.0 | 30.0 | 98.0 |
| Per share (diluted) | $0.11 | $1.90 | $4.52 | $5.03 | $6.03 | $1.98 | $0.63 | $2.04 |
| |
| Cash paid for interest | 63.6 | 52.6 | 15.7 | 7.0 | 8.6 | 6.7 | 9.9 | 9.8 |