| 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 | 8-K | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | -101.1 | -76.7 | -98.1 | -86.5 | -85.3 | -77.7 | -71.7 | -66.1 |
| Depreciation and amortization [+] | | | 9.0 | 8.2 | 7.4 | 6.2 | 5.6 | 5.2 |
| Depreciation | 4.6 | | 4.6 | 3.8 | 2.9 | 6.2 | 5.6 | 5.2 |
| Asset impairment charges | 18.6 | | 0.3 | 0.7 | 0.8 | 0.8 | 0.7 | 0.3 |
| Stock-based compensation | | | 22.2 | 22.3 | 23.1 | 22.1 | 21.2 | 21.9 |
| Change in working capital [+] | | | 40.7 | 46.4 | 43.8 | 36.4 | 24.7 | 5.8 |
| Accounts receivable | | | 7.4 | 4.5 | 5.9 | -1.3 | -13.0 | -12.0 |
| Inventories | | | -2.0 | -2.9 | -2.5 | -5.2 | -6.6 | -3.5 |
| Other current assets | 5.5 | | 3.4 | 1.8 | -1.5 | -0.4 | -3.5 | -4.4 |
| Accounts payable | | | 2.7 | -3.6 | 0.4 | 1.5 | 3.9 | 7.8 |
| Accrued expenses | -14.7 | | | | -0.6 | | | |
| Other | | | 29.7 | 47.3 | 42.1 | 41.8 | 44.0 | 17.9 |
| Other operating activities | | | -21.7 | -43.1 | -39.4 | -39.7 | -33.6 | -8.7 |
| Cash from operations | | | -47.5 | -51.9 | -49.6 | -51.8 | -53.1 | -41.6 |
| |
| Capital expenditures | | | -8.1 | -12.8 | -18.2 | -19.8 | -15.8 | -12.2 |
| Purchases of property and equipment | | | -8.1 | -12.8 | -18.2 | -19.8 | -15.8 | -12.2 |
| Purchases of short-term investments, net | 10.2 | | -45.9 | -14.0 | -9.4 | | | |
| Purchases of short-term investments | -57.9 | | -64.8 | -18.8 | -9.4 | | | |
| Sales of short-term investments | 68.1 | | 18.9 | 4.8 | | | | |
| Cash from investing | | | -54.0 | -26.9 | -27.6 | -19.8 | -15.8 | -12.2 |
| |
| Repurchase of common stock, net | | | -0.6 | -3.5 | -2.2 | -1.5 | 0.0 | 3.6 |
| Option exercises | 0.3 | | 0.8 | 1.5 | 2.7 | 4.3 | 10.3 | 10.2 |
| Financing costs | -1.2 | | | | | | | -0.3 |
| Other cash from financing | | | 11.1 | 7.2 | 9.8 | 11.7 | 23.6 | 19.8 |
| Cash from financing | | | 9.7 | 2.2 | 4.9 | 6.1 | 13.6 | 13.5 |
| |
| Free cash flow | | | -55.6 | -64.8 | -67.8 | -71.6 | -69.0 | -53.8 |
| Per share (diluted) | | | ($0.82) | ($0.96) | ($1.01) | ($1.07) | ($1.04) | ($0.93) |