| In millions, except per share items | May-31-22 | May-31-21 | Dec-31-20 | May-31-20 | Dec-31-19 | May-31-19 | Dec-31-18 | Dec-31-17 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -476.8 | -367.4 | -271.1 | -102.5 | -321.2 | -25.0 | -67.7 | -7.8 |
| Depreciation and amortization | 154.6 | 67.8 | 18.7 | 35.7 | 15.8 | 17.2 | 3.6 | 1.9 |
| Asset impairment charges | 378.2 | 19.9 | 61.1 | 50.7 | 112.1 | 57.2 | | |
| Stock-based compensation | 36.0 | 17.4 | 29.7 | 18.1 | 31.8 | 22.0 | 21.0 | 0.1 |
| Deferred taxes | -27.5 | -24.9 | -5.4 | -13.3 | -8.8 | -5.8 | -4.5 | |
| Change in working capital [+] | -27.4 | 60.6 | -25.1 | 48.4 | -54.2 | 0.2 | -7.7 | 3.0 |
| Accounts receivable | | | 6.3 | | -14.8 | | -16.5 | -0.5 |
| Inventories | | | -30.1 | | -102.6 | | -9.2 | -3.3 |
| Other current assets | | | -5.4 | | -51.4 | | -2.5 | -0.4 |
| Accounts payable | | | -20.5 | | 20.0 | | 5.2 | 4.7 |
| Accrued expenses | | | -10.3 | | 28.3 | | 9.4 | 1.0 |
| Other | -27.4 | 60.6 | 34.8 | 48.4 | 66.4 | 0.2 | 5.8 | 1.6 |
| Other operating activities | -214.4 | 181.8 | 62.7 | -137.6 | -33.6 | -107.7 | 9.2 | -3.2 |
| Cash from operations | -177.3 | -44.7 | -129.4 | -100.6 | -258.1 | -42.0 | -46.2 | -6.0 |
| |
| Capital expenditures [+] | -34.1 | -38.9 | -44.6 | -98.8 | -73.7 | -155.8 | -50.2 | -10.9 |
| Purchases of property and equipment | -34.1 | -38.9 | -44.6 | -98.8 | -73.7 | -155.8 | -50.2 | -10.9 |
| Sales of property and equipment | 12.2 | 6.6 | 2.7 | 1.4 | 6.6 | 0.0 | 0.7 | 0.0 |
| Purchases of intangible assets | | | | | -4.9 | | -4.3 | -0.5 |
| Acquisitions | 0.3 | 66.6 | | -25.9 | -163.9 | -17.8 | | |
| Sales of short-term investments | | | | 14.8 | | 18.7 | | |
| Sales of short-term investments | | | | 14.8 | | 18.7 | | |
| Other cash from investing | | 11.8 | 0.3 | 38.5 | -17.3 | 20.3 | -44.9 | -0.4 |
| Cash from investing | -21.5 | 46.1 | -41.7 | -69.9 | -253.2 | -134.5 | -98.6 | -11.8 |
| |
| Issuance of common stock, net | 262.5 | 102.6 | 85.5 | 74.4 | | 186.0 | 160.8 | |
| Option exercises | | | 11.5 | | 5.5 | | | |
| Other cash from financing | -134.3 | 21.8 | 190.9 | 56.2 | 120.2 | 361.2 | 470.2 | 12.2 |
| Cash from financing | 128.2 | 124.3 | 264.8 | 130.6 | 114.7 | 547.2 | 631.0 | 12.2 |
| |
| Free cash flow | -211.3 | -83.6 | -174.0 | -199.4 | -331.8 | -197.8 | -96.4 | -16.9 |
| Per share (diluted) | ($0.44) | ($0.31) | ($1.38) | ($0.92) | ($3.30) | ($0.97) | ($1.16) | ($0.23) |
| |
| Cash paid for interest | | | 27.6 | | 28.2 | | 1.2 | 1.2 |