| In millions, except per share items | Sep-30-22 | Sep-30-21 | Sep-30-20 | Sep-30-18 | Sep-30-17 | Sep-30-16 | Sep-25-15 | Sep-26-14 |
| | 10-K | 10-K | 10-K | 8-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 913.4 | 587.9 | 152.3 | 136.6 | 84.6 | 58.8 | -5.0 | -103.0 |
| Depreciation and amortization [+] | 84.4 | 78.6 | 74.5 | | 54.7 | 55.0 | 59.5 | 58.7 |
| Depreciation | 48.2 | 44.9 | 42.2 | 32.1 | 32.3 | 32.8 | 37.4 | 37.8 |
| Amortization | 36.2 | 33.6 | 32.3 | | 22.4 | 22.2 | 22.1 | 20.9 |
| Asset impairment charges | | | | | | 0.1 | 27.9 | |
| Stock-based compensation | 17.2 | 17.0 | 13.1 | | 12.8 | 21.1 | 13.5 | 8.4 |
| Deferred taxes | 3.1 | -43.3 | 4.5 | | 0.9 | 2.6 | -3.7 | -36.5 |
| Change in working capital [+] | -259.5 | -63.3 | -12.5 | | -38.5 | 14.6 | 42.7 | 38.6 |
| Accounts receivable | 17.7 | -219.7 | 16.9 | | -13.4 | 24.5 | 7.0 | -12.1 |
| Inventories | -161.0 | -81.5 | 24.6 | | -10.3 | -2.4 | 67.5 | 7.7 |
| Other current assets | -21.7 | -6.5 | -11.2 | | -3.1 | -3.0 | -0.6 | 16.6 |
| Accounts payable | -29.0 | 98.4 | -5.8 | | 8.7 | 4.1 | -43.7 | 26.8 |
| Accrued expenses | 27.2 | 63.5 | -32.9 | | -11.2 | -9.6 | 16.3 | -1.0 |
| Income taxes | -92.8 | 82.5 | -4.2 | | -9.1 | 1.0 | -3.8 | 0.7 |
| Other operating activities | 28.2 | -4.0 | 17.0 | | 7.1 | 4.4 | 6.0 | 122.0 |
| Cash from operations | 786.8 | 572.9 | 248.8 | | 121.7 | 156.6 | 141.1 | 88.2 |
| |
| Capital expenditures [+] | -135.8 | -64.5 | -33.8 | | -25.1 | -16.8 | -26.8 | -24.4 |
| Purchases of property and equipment | -135.8 | -64.5 | -33.8 | | -25.1 | -16.8 | -26.8 | -24.4 |
| Sales of property and equipment | 0.8 | 0.1 | 3.9 | | 0.1 | 0.1 | 1.5 | 7.4 |
| Acquisitions | -307.8 | -43.2 | | | -183.9 | | -30.5 | -39.8 |
| Other cash from investing | | 9.6 | 2.3 | | 3.1 | 3.9 | 9.3 | 7.9 |
| Cash from investing | -442.8 | -98.0 | -27.5 | | -205.8 | -12.9 | -46.6 | -48.9 |
| |
| Repurchase of common stock, net | -524.2 | -132.4 | -3.0 | | -1.8 | 0.1 | -0.8 | -252.1 |
| Financing costs | | | | | -4.4 | | -0.1 | -11.9 |
| Other cash from financing | | -52.1 | -58.2 | | -70.4 | -24.0 | -43.4 | 182.6 |
| Cash from financing | -524.2 | -184.5 | -61.2 | | -67.8 | -23.9 | -44.1 | -57.6 |
| |
| Free cash flow | 651.1 | 508.4 | 215.0 | | 96.5 | 139.8 | 114.2 | 63.9 |
| Per share (diluted) | $14.70 | $10.75 | $4.47 | | $1.45 | $2.23 | $1.83 | $1.25 |
| |
| Cash paid for interest | 30.5 | 23.7 | 38.8 | | 26.1 | 49.9 | 41.5 | 42.8 |
| Cash paid for income taxes | 379.8 | 155.1 | 51.0 | | 49.8 | 30.9 | 4.8 | 2.2 |