| 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 | 65.0 | 69.4 | 80.6 | 80.3 | 88.9 | 82.7 | 70.5 | 55.3 |
| Depreciation and amortization [+] | 111.7 | 107.9 | 106.1 | 103.9 | 104.1 | 107.1 | 108.8 | 111.3 |
| Depreciation | 76.6 | 74.9 | 74.2 | 73.8 | 75.8 | 78.3 | 79.7 | 81.4 |
| Amortization | 35.1 | 33.0 | 31.9 | 30.1 | 28.3 | 28.8 | 29.2 | 30.0 |
| Stock-based compensation | 27.7 | 27.9 | 28.1 | 27.6 | 25.7 | 23.9 | 23.1 | 22.6 |
| Deferred taxes | -9.6 | -10.6 | -9.6 | -14.8 | -11.5 | -5.6 | -5.0 | -19.1 |
| Change in working capital [+] | 16.6 | -29.0 | -50.3 | -48.1 | -14.0 | -4.7 | 22.6 | 52.8 |
| Accounts receivable | -7.3 | -41.0 | -4.9 | -34.1 | -31.7 | -21.7 | -34.6 | -10.2 |
| Other current assets | -16.1 | -1.0 | -6.1 | -7.5 | 0.4 | -6.4 | -4.4 | 13.8 |
| Deferred revenues | 21.0 | 27.4 | -37.9 | -19.4 | -10.9 | -2.6 | 60.2 | 34.0 |
| Income taxes | 4.0 | -3.3 | -8.4 | -1.8 | 2.2 | -1.2 | -6.8 | 3.3 |
| Other | 15.0 | -11.1 | 6.9 | 14.6 | 26.0 | 27.3 | 8.2 | 11.9 |
| Other operating activities | 31.4 | 31.7 | 33.6 | 24.1 | 24.1 | 14.1 | 7.3 | 2.0 |
| Cash from operations | 242.7 | 197.2 | 188.5 | 173.0 | 217.3 | 217.5 | 227.3 | 225.0 |
| |
| Capital expenditures [+] | -84.5 | -78.3 | -70.6 | -64.4 | -55.7 | -57.2 | -63.5 | -77.6 |
| Purchases of property and equipment | -84.5 | -78.3 | -70.6 | -64.4 | -55.7 | -57.2 | -63.5 | -77.6 |
| Sales of property and equipment | 3.6 | | 10.5 | 10.4 | 7.3 | | 5.8 | 7.7 |
| Acquisitions | -238.0 | -210.4 | -210.4 | -244.4 | -48.1 | -45.1 | -53.9 | -19.1 |
| Purchases of short-term investments | -27.0 | -28.2 | -25.1 | -23.7 | -26.3 | -27.8 | -29.9 | -39.6 |
| Purchases of short-term investments | -27.0 | -28.2 | -25.1 | -23.7 | -26.3 | -27.8 | -29.9 | -39.6 |
| Other cash from investing | 22.3 | 19.4 | 17.5 | 16.4 | 20.0 | 23.6 | 24.1 | 30.5 |
| Cash from investing | -323.6 | -286.9 | -278.0 | -305.6 | -102.9 | -104.5 | -117.4 | -98.1 |
| |
| Repurchase of common stock, net | | | | -294.2 | -216.0 | -253.7 | -213.8 | -102.2 |
| Option exercises | 10.1 | 8.7 | 13.2 | 17.1 | 19.9 | 23.9 | 37.5 | 43.6 |
| Other cash from financing | 1.3 | 41.2 | 74.5 | 79.9 | -26.4 | -20.5 | 19.2 | 61.2 |
| Cash from financing | -118.8 | -110.2 | -121.3 | -231.4 | -262.3 | -296.1 | -230.0 | -82.5 |
| |
| Free cash flow | 158.2 | 118.9 | 117.9 | 108.6 | 161.6 | 160.3 | 163.8 | 147.4 |
| Per share (diluted) | $2.73 | $2.04 | $2.01 | $1.83 | $2.69 | $2.65 | $2.68 | $2.42 |
| |
| Cash paid for interest | 63.5 | 52.6 | 40.9 | 32.0 | 28.9 | 30.0 | 32.2 | 33.8 |