| 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 | 16.1 | 36.3 | 26.2 | 9.7 | 17.1 | 36.9 | 22.7 | 12.5 |
| Depreciation and amortization | 17.3 | 17.2 | 17.4 | 17.3 | 17.2 | 17.0 | 16.2 | 15.8 |
| Stock-based compensation | 0.6 | 2.5 | 1.4 | 0.9 | 1.1 | 2.0 | 1.8 | 1.1 |
| Deferred taxes | 3.2 | 2.5 | 7.5 | 4.8 | 4.0 | 7.4 | 8.6 | 5.2 |
| Change in working capital [+] | 21.3 | -4.5 | -21.5 | -6.7 | 26.9 | 5.0 | -41.6 | -4.1 |
| Accounts receivable | 25.2 | 5.6 | -41.9 | 5.9 | 17.2 | 7.5 | -24.1 | -1.2 |
| Inventories | -0.3 | 5.4 | -4.5 | -3.6 | -3.8 | 4.0 | -5.1 | -3.3 |
| Other current assets | -1.0 | 4.0 | 3.6 | -4.8 | 3.7 | 6.6 | 5.3 | -9.6 |
| Other | -2.6 | -19.5 | 21.3 | -4.2 | 9.7 | -13.2 | -17.7 | 10.1 |
| Other operating activities | 8.8 | 27.7 | -8.1 | -13.8 | -11.6 | 0.8 | -10.0 | -12.0 |
| Cash from operations | 67.3 | 81.7 | 22.9 | 12.2 | 54.7 | 69.1 | -2.3 | 18.6 |
| |
| Capital expenditures [+] | -47.8 | -42.4 | -30.2 | -32.9 | -35.2 | -29.9 | -38.7 | -43.6 |
| Purchases of property and equipment | -47.8 | -42.4 | -30.2 | -32.9 | -35.2 | -29.9 | -38.7 | -43.6 |
| Sales of property and equipment | 1.5 | 0.5 | 0.3 | 0.2 | 3.1 | 0.2 | 0.3 | 0.2 |
| Acquisitions | | | -9.8 | | -2.0 | | -36.4 | |
| Other cash from investing | 0.0 | -0.7 | 0.4 | -0.2 | -0.2 | -0.3 | -0.2 | -0.2 |
| Cash from investing | -46.3 | -42.7 | -39.3 | -33.0 | -34.2 | -29.9 | -74.9 | -43.5 |
| |
| Cash dividends paid | -9.5 | -9.5 | -9.3 | -9.3 | -8.3 | -8.3 | -8.3 | -8.2 |
| Issuance of common stock, net | 0.0 | | 0.1 | 0.2 | 1.0 | 3.2 | 8.8 | 2.3 |
| Other cash from financing | -10.3 | -32.7 | 29.4 | 28.2 | -14.2 | -33.9 | 75.8 | 31.8 |
| Cash from financing | -19.9 | -42.2 | 20.2 | 19.0 | -21.5 | -39.0 | 76.3 | 25.9 |
| |
| Free cash flow | 19.5 | 39.2 | -7.4 | -20.7 | 19.5 | 39.2 | -41.0 | -25.0 |
| Per share (diluted) | $1.09 | $2.20 | ($0.41) | ($1.16) | $1.09 | $2.21 | ($2.32) | ($1.42) |