| 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 | 8-K | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | 19.0 | 8.3 | 33.1 | 20.6 | 24.1 | 31.0 | 8.7 | 75.8 |
| Depreciation and amortization | 77.3 | | 41.4 | 31.1 | 35.8 | 47.4 | 76.9 | 83.7 |
| Stock-based compensation | | | | -7.2 | -2.8 | 2.8 | | -5.0 |
| Deferred taxes | -2.4 | | 1.3 | 0.6 | 0.7 | -8.0 | 0.9 | 0.3 |
| Change in working capital [+] | | | 3.9 | 12.5 | 25.3 | -25.3 | -9.1 | -2.2 |
| Accounts receivable | | | | 17.1 | 27.8 | -27.8 | | 0.4 |
| Inventories | | | | 2.4 | 4.9 | -4.9 | | 1.6 |
| Accounts payable | | | | -7.0 | -7.4 | 7.4 | | -4.2 |
| Other | | | 3.9 | | | | -9.1 | |
| Other operating activities | 32.4 | | -20.5 | 3.8 | 15.7 | 1.8 | -29.6 | -39.8 |
| Cash from operations | 126.3 | | 59.3 | 61.4 | 98.9 | 49.7 | 47.7 | 112.9 |
| |
| Capital expenditures | 51.6 | | 104.2 | 95.5 | 55.1 | -18.7 | 107.8 | 95.1 |
| Purchases of property and equipment | 51.6 | | 104.2 | 95.5 | 55.1 | -18.7 | 107.8 | 95.1 |
| Other cash from investing | -108.0 | | -564.7 | -116.9 | -70.6 | -0.2 | -203.4 | 23.3 |
| Cash from investing | -56.5 | | -460.5 | -21.4 | -15.5 | -18.9 | -95.6 | 118.5 |
| |
| Cash dividends paid | 85.2 | | 42.1 | 205.4 | 121.2 | -39.4 | 39.3 | 189.9 |
| Issuance of common stock, net | 4.1 | | 29.7 | 8.4 | 5.4 | 30.7 | 64.3 | 59.1 |
| Option exercises | | | 0.0 | 0.0 | 2.0 | 0.6 | 1.2 | 0.2 |
| Financing costs | | | | | | | 0.0 | 9.6 |
| Other cash from financing | -180.3 | | 161.3 | -266.5 | -174.9 | -125.4 | -166.3 | -303.4 |
| Cash from financing | -91.0 | | 233.0 | -52.7 | -50.2 | -134.7 | -64.0 | -64.2 |
| |
| Free cash flow | 177.9 | | 163.5 | 156.9 | 153.9 | 30.9 | 155.5 | 208.0 |
| Per share (diluted) | $1.18 | | $1.09 | $1.04 | $1.02 | $0.21 | $1.07 | $1.42 |
| |
| Cash paid for interest | | | 11.6 | 7.2 | 13.0 | 3.9 | 18.0 | 7.0 |
| Cash paid for income taxes | | | 0.5 | 0.3 | 0.3 | 14.0 | 0.1 | 0.2 |