| 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 | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | -49.7 | -52.6 | -312.4 | -60.8 | -297.3 | -69.9 | -71.2 | -66.9 |
| Depreciation and amortization | 13.5 | 13.4 | 12.5 | 12.7 | 12.7 | 12.9 | 9.3 | 6.1 |
| Asset impairment charges | | | 269.3 | | 229.5 | | | |
| Stock-based compensation | 9.7 | 9.3 | 10.2 | 10.9 | 17.0 | 9.9 | 12.6 | 10.0 |
| Change in working capital [+] | -3.3 | -8.5 | -4.1 | -6.7 | -17.1 | -14.4 | -3.5 | -7.4 |
| Accounts receivable | -6.5 | 2.8 | 3.6 | -5.1 | -1.2 | 9.5 | -9.8 | -4.9 |
| Inventories | -1.9 | -6.9 | 3.0 | -5.8 | -9.9 | -15.5 | -5.9 | -4.4 |
| Other current assets | 4.0 | -4.7 | 2.8 | 2.0 | 1.1 | -4.1 | -5.8 | 0.6 |
| Accounts payable | 2.6 | -3.0 | -3.6 | -0.2 | -1.4 | -1.3 | 8.6 | 4.4 |
| Deferred revenues | -2.0 | 1.1 | -3.2 | -1.5 | -0.8 | 0.7 | 4.7 | 0.6 |
| Other | 0.4 | 2.1 | -6.6 | 3.9 | -4.9 | -3.7 | 4.8 | -3.7 |
| Other operating activities | -3.3 | 1.1 | -6.2 | 4.1 | 0.4 | 5.3 | 7.8 | 20.2 |
| Cash from operations | -33.1 | -37.3 | -30.7 | -39.7 | -54.8 | -56.3 | -45.0 | -38.2 |
| |
| Capital expenditures [+] | -0.3 | -1.0 | -3.4 | -1.4 | -2.7 | -4.1 | -3.5 | -2.8 |
| Purchases of property and equipment | -0.3 | -1.0 | -3.4 | -1.4 | -2.7 | -4.1 | -3.5 | -2.8 |
| Sales of property and equipment | 6.9 | 3.1 | | | | 0.0 | | |
| Acquisitions | | -0.5 | | | | 0.0 | -96.5 | -29.3 |
| Sales of short-term investments, net [+] | 42.9 | 59.9 | 42.5 | -3.1 | -48.2 | 98.6 | 79.5 | 47.7 |
| Purchases of short-term investments | | -5.0 | | -31.6 | -126.8 | | | -49.4 |
| Sales of short-term investments | 42.9 | 64.8 | 42.5 | 28.5 | 78.5 | 98.6 | 79.5 | 97.1 |
| Other cash from investing | | | | 3.4 | | | 0.4 | -35.2 |
| Cash from investing | 49.5 | 61.4 | 39.1 | -1.2 | -50.9 | 94.5 | -20.2 | -19.6 |
| |
| Issuance of common stock, net | | | 50.0 | | | | | |
| Option exercises | 0.6 | 0.6 | 0.2 | 1.8 | 0.4 | 0.9 | 1.2 | 1.6 |
| Other cash from financing | 1.0 | 0.8 | -49.8 | 3.3 | 111.9 | 1.6 | 2.3 | 2.8 |
| Cash from financing | 0.5 | 0.2 | 0.0 | 1.5 | 111.5 | 0.7 | 1.1 | 1.3 |
| |
| Free cash flow | -33.4 | -38.4 | -34.1 | -41.2 | -57.4 | -60.3 | -48.5 | -40.9 |
| Per share (diluted) | ($0.10) | ($0.12) | ($0.11) | ($0.13) | ($0.18) | ($0.19) | ($0.19) | ($0.16) |
| |
| Cash paid for interest | | | | | | | 0.0 | 0.0 |