| 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 | 8-K | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | 159.1 | 159.1 | 159.1 | 41.7 | 85.3 | 85.3 | 85.3 | 84.3 |
| Depreciation and amortization | | | | | 45.8 | 42.4 | 42.8 | 42.1 |
| Depreciation | | | | 55.2 | | | | |
| Stock-based compensation | | | | | 3.1 | 2.5 | 2.0 | |
| Change in working capital [+] | | | | | 52.9 | 49.4 | 65.6 | 56.1 |
| Accounts receivable | | | | | 3.0 | -8.0 | 0.3 | -0.9 |
| Other current assets | -1.7 | -1.3 | | | -0.2 | -0.9 | 0.1 | -1.2 |
| Other | | | | | 50.1 | 58.3 | 65.2 | 58.3 |
| Other operating activities | | | | | 73.6 | 81.8 | 79.5 | 96.8 |
| Cash from operations | | | | | 260.7 | 261.4 | 275.2 | 280.6 |
| |
| Capital expenditures [+] | | | | | -49.8 | -27.5 | -23.1 | -18.7 |
| Purchases of property and equipment | | | | | -49.8 | -27.5 | -23.1 | -18.7 |
| Sales of property and equipment | 0.5 | | | | 0.1 | 0.2 | | 0.3 |
| Purchases of intangible assets | -7.0 | -7.6 | -9.4 | | -5.4 | -4.3 | -2.3 | -0.6 |
| Acquisitions | | | | | -621.8 | | | |
| Other cash from investing | | | | | 6.5 | 6.7 | 8.7 | 4.4 |
| Cash from investing | | | | | -670.5 | -24.9 | -16.4 | -14.7 |
| |
| Cash dividends paid | | | | | | | 161.6 | |
| Financing costs | -9.8 | -9.3 | -8.9 | | -0.6 | | | -6.2 |
| Other cash from financing | | | | | 259.2 | -414.9 | -426.6 | -410.1 |
| Cash from financing | | | | | 421.4 | -247.1 | -258.8 | -267.1 |
| |
| Free cash flow | | | | | 210.9 | 233.8 | 252.1 | 261.9 |
| Per share (diluted) | | | | | $4.85 | $5.38 | $5.80 | $6.39 |
| |
| Cash paid for interest | 65.4 | 46.4 | | | 55.8 | 41.8 | 44.6 | 32.9 |