| In millions, except per share items | Sep-30-22 | Sep-30-21 | Sep-30-20 | Sep-30-19 | Sep-30-18 | Sep-30-17 | Sep-30-16 | Sep-30-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 98.6 | 117.0 | 67.6 | -372.2 | 103.3 | 5.7 | 178.7 | -275.3 |
| Depreciation and amortization | 89.9 | 87.1 | 88.8 | 93.8 | 97.6 | 94.4 | 92.6 | 115.3 |
| Asset impairment charges | | | | 570.0 | 49.7 | 319.0 | 6.5 | 318.2 |
| Stock-based compensation | 23.8 | 27.3 | 19.2 | 17.8 | 17.0 | 22.2 | 25.6 | 32.9 |
| Deferred taxes | -13.7 | 9.6 | -2.9 | -59.6 | 2.3 | -87.4 | 7.8 | -190.4 |
| Change in working capital [+] | -81.0 | -26.9 | 43.2 | -47.5 | -4.2 | -3.3 | -108.6 | 13.5 |
| Accounts receivable | -6.6 | 3.7 | 66.3 | -1.9 | -10.7 | 41.4 | 23.3 | 21.7 |
| Inventories | -111.3 | -28.8 | 37.1 | -35.0 | -12.3 | -15.5 | 28.2 | -35.7 |
| Other current assets | -11.5 | -13.8 | 3.0 | -14.7 | -2.0 | 22.6 | 75.8 | 13.9 |
| Accounts payable | 30.4 | 25.4 | -42.9 | -15.1 | 11.5 | 23.7 | -29.3 | -73.4 |
| Other | 18.0 | -13.4 | -20.3 | 19.2 | 9.3 | -75.5 | -206.6 | 87.0 |
| Other operating activities | -15.6 | 14.9 | 16.7 | -11.7 | -6.3 | -37.0 | -15.8 | 134.6 |
| Cash from operations | 102.0 | 229.0 | 232.6 | 190.6 | 259.4 | 313.6 | 186.8 | 148.8 |
| |
| Capital expenditures [+] | -56.4 | -56.8 | -47.7 | -58.0 | -62.0 | -69.0 | -69.5 | -99.4 |
| Purchases of property and equipment | -56.4 | -56.8 | -47.7 | -58.0 | -62.0 | -69.0 | -69.5 | -99.4 |
| Sales of property and equipment | | | | 4.1 | 4.7 | 18.4 | | 16.6 |
| Acquisitions | -309.4 | -0.3 | -233.6 | | -90.2 | -34.0 | | -12.1 |
| Other cash from investing | 10.4 | 8.4 | 84.9 | 8.4 | 28.7 | | | -79.9 |
| Cash from investing | -355.4 | -48.7 | -196.4 | -45.5 | -118.8 | -84.6 | -69.5 | -174.8 |
| |
| Cash dividends paid | -32.6 | -25.6 | | | | | | -93.2 |
| Repurchase of common stock, net | -125.3 | -9.2 | | | -124.4 | -165.4 | -196.6 | -175.2 |
| Option exercises | | | | | | | | 4.4 |
| Financing costs | | -6.5 | | | | -17.4 | -10.4 | -15.1 |
| Other cash from financing | 140.3 | -37.1 | -18.7 | -63.8 | -255.2 | -330.0 | 92.8 | -69.5 |
| Cash from financing | -17.6 | -65.4 | -18.7 | -63.8 | -379.6 | -478.0 | -93.4 | -327.2 |
| |
| Free cash flow | 45.6 | 172.2 | 184.9 | 132.6 | 197.4 | 244.6 | 117.3 | 49.4 |
| Per share (diluted) | $0.85 | $3.12 | $3.39 | $2.45 | $3.62 | $4.25 | $1.96 | $0.80 |
| |
| Cash paid for interest | 68.4 | 61.0 | 56.1 | 60.6 | 66.6 | 66.4 | 71.3 | 164.3 |
| Cash paid for income taxes | 23.8 | 25.4 | 24.6 | 58.0 | 22.0 | 14.4 | 28.3 | 55.0 |