| In millions, except per share items | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 | Sep-30-20 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | 293.2 | 178.5 | 282.7 | 172.5 | 124.8 | 102.4 | 96.7 | 115.2 |
| Depreciation and amortization | | 8.8 | 10.3 | 9.9 | | 9.6 | 10.4 | 9.3 |
| Stock-based compensation | | 6.9 | 4.8 | 4.8 | | 5.7 | 4.9 | 5.3 |
| Deferred taxes | | | 86.8 | | | | 38.9 | 11.7 |
| Change in working capital [+] | | -199.2 | 104.2 | -241.7 | | -374.2 | 112.9 | 261.5 |
| Inventories | | -286.8 | 335.7 | -195.3 | | -356.5 | 95.4 | 274.5 |
| Other current assets | | 171.6 | -295.1 | -66.4 | | -85.3 | -56.0 | 26.1 |
| Income taxes | | 54.2 | -36.4 | 17.7 | | 33.3 | -20.2 | 21.2 |
| Other | | -138.2 | 100.0 | 2.3 | | 34.2 | 93.6 | -60.2 |
| Other operating activities | -23.5 | 62.5 | -8.6 | 48.5 | -2.1 | 112.2 | 61.6 | 71.9 |
| Cash from operations | 269.6 | 57.5 | 480.2 | -6.0 | 122.6 | -144.3 | 325.3 | 474.8 |
| |
| Capital expenditures | 0.0 | -5.4 | -5.5 | 4.8 | 0.0 | -7.8 | -12.5 | -8.2 |
| Purchases of property and equipment | | -5.4 | -5.5 | 4.8 | | -7.8 | -12.5 | -8.2 |
| Acquisitions | | | | | | | | 0.1 |
| Purchases of short-term investments | | | -10.0 | | | | | |
| Purchases of short-term investments | | | -10.0 | | | | | |
| Other cash from investing | | -2.1 | -15.5 | -26.1 | | -5.7 | -2.8 | -10.6 |
| Cash from investing | 0.0 | -7.4 | -31.0 | -21.3 | 0.0 | -13.5 | -15.3 | -18.7 |
| |
| Repurchase of common stock, net | | -58.0 | -44.6 | -91.7 | | -38.4 | -13.2 | |
| Option exercises | | 2.4 | 5.1 | 5.8 | | 6.3 | 1.7 | 2.5 |
| Financing costs | | | | | | | -0.1 | -6.2 |
| Other cash from financing | | -255.1 | 61.8 | 131.5 | | 61.9 | -310.2 | -587.7 |
| Cash from financing | 0.0 | -315.5 | 12.1 | 34.1 | 0.0 | 17.2 | -324.9 | -584.0 |
| |
| Free cash flow | 269.6 | 52.1 | 474.7 | -1.1 | 122.6 | -152.1 | 312.8 | 466.6 |
| Per share (diluted) | $2.27 | $0.42 | $3.71 | ($0.01) | $0.94 | ($1.16) | $2.42 | $3.55 |
| |
| Cash paid for income taxes | | -0.2 | -49.4 | -35.3 | | 4.6 | -0.9 | -3.0 |