| 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 | 88.3 | 89.2 | 89.8 | 86.4 | 89.2 | 85.9 | 83.5 | 83.1 |
| Depreciation and amortization | 69.3 | 69.2 | 69.0 | 67.7 | 66.2 | 64.3 | 62.7 | 61.8 |
| Stock-based compensation | 5.4 | 5.9 | 5.3 | 5.7 | 6.0 | 6.1 | 5.9 | 5.5 |
| Deferred taxes | 18.0 | 18.8 | 23.7 | 24.8 | 25.3 | 27.7 | 26.7 | 20.6 |
| Change in working capital [+] | -11.4 | -5.8 | 3.8 | -16.4 | -13.7 | -14.4 | -12.6 | 28.6 |
| Accounts receivable | -5.1 | -13.1 | -11.2 | 6.6 | -0.5 | 6.4 | -1.6 | 4.8 |
| Inventories | -3.1 | -6.5 | -7.8 | -8.5 | -8.2 | -6.9 | -9.5 | -5.5 |
| Other current assets | 1.8 | 6.5 | 9.1 | 10.8 | 6.0 | 0.9 | -1.5 | -5.5 |
| Other | -5.0 | 7.3 | 13.6 | -25.4 | -11.1 | -14.9 | 0.0 | 34.9 |
| Other operating activities | 14.5 | -5.9 | -32.7 | -34.5 | -32.8 | -30.4 | -15.6 | -3.7 |
| Cash from operations | 184.1 | 171.4 | 158.9 | 133.7 | 140.1 | 139.2 | 150.5 | 195.8 |
| |
| Capital expenditures [+] | -153.5 | -140.8 | -128.3 | -136.7 | -147.4 | -164.8 | -186.9 | -190.3 |
| Purchases of property and equipment | -153.5 | -140.8 | -128.3 | -136.7 | -147.4 | -164.8 | -186.9 | -190.3 |
| Sales of property and equipment | 2.5 | 4.1 | 3.9 | 3.9 | 3.9 | 0.9 | 1.0 | 4.5 |
| Acquisitions | | | -11.8 | | -38.4 | | -36.4 | |
| Other cash from investing | -0.6 | -0.7 | -0.3 | -0.8 | -0.8 | -0.8 | -0.8 | -0.7 |
| Cash from investing | -161.3 | -149.2 | -136.4 | -172.1 | -182.7 | -201.1 | -223.0 | -193.2 |
| |
| Cash dividends paid | -37.6 | -36.4 | -35.1 | -34.1 | -33.1 | -32.3 | -31.5 | -30.4 |
| Issuance of common stock, net | 0.3 | | 4.5 | 13.2 | 15.3 | 17.0 | 15.9 | 70.9 |
| Other cash from financing | 14.5 | 10.7 | 9.4 | 55.8 | 59.5 | 76.8 | 89.7 | -40.4 |
| Cash from financing | -22.8 | -24.4 | -21.2 | 34.9 | 41.8 | 61.5 | 74.0 | 0.2 |
| |
| Free cash flow | 30.6 | 30.6 | 30.6 | -3.0 | -7.3 | -25.6 | -36.4 | 5.5 |
| Per share (diluted) | $1.72 | $1.72 | $1.72 | ($0.17) | ($0.41) | ($1.45) | ($2.07) | $0.32 |