| 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 | -85.3 | -124.0 | -52.4 | -47.0 | -105.1 | -65.2 | 224.6 | -82.5 |
| Depreciation and amortization [+] | 6.5 | | 3.6 | 4.4 | 4.4 | 4.3 | 4.4 | 4.3 |
| Depreciation | 5.2 | | 3.0 | 3.8 | 3.8 | 3.7 | 3.8 | 3.7 |
| Amortization of intangible assets | 1.2 | | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 |
| Asset impairment charges | 0.6 | | 0.9 | 0.2 | 0.8 | 0.1 | 1.6 | 0.3 |
| Stock-based compensation | 53.5 | | 25.7 | 23.8 | 24.5 | 26.2 | 22.3 | 30.5 |
| Change in working capital [+] | -36.9 | | 27.5 | 6.0 | 40.9 | -7.3 | 19.1 | -9.7 |
| Inventories | -3.5 | | -1.4 | -0.8 | 4.2 | 0.8 | -1.9 | 1.2 |
| Accounts payable | 5.5 | | -4.5 | 8.3 | -5.6 | 2.9 | 4.7 | -7.9 |
| Income taxes | 18.5 | | 6.2 | 0.0 | -0.9 | 0.9 | -1.4 | -0.4 |
| Other | -57.4 | | 27.2 | -1.5 | 43.2 | -11.8 | 17.6 | -2.5 |
| Other operating activities | -169.7 | | -205.5 | -11.9 | 16.4 | 10.2 | -68.3 | 1.4 |
| Cash from operations | -231.4 | | -200.2 | -24.4 | -18.1 | -31.7 | 203.7 | -55.6 |
| |
| Capital expenditures | -22.5 | | -4.1 | -5.5 | -3.3 | -2.7 | -2.5 | -3.3 |
| Purchases of property and equipment | -22.5 | | -4.1 | -5.5 | -3.3 | -2.7 | -2.5 | -3.3 |
| Purchases of short-term investments, net | -231.3 | | -36.9 | -176.9 | 1.2 | -284.0 | 99.1 | 133.8 |
| Purchases of short-term investments | -932.4 | | -262.0 | -560.6 | -200.3 | -462.9 | -193.2 | -190.2 |
| Sales of short-term investments | 701.0 | | 225.1 | 383.7 | 201.5 | 178.8 | 292.3 | 324.0 |
| Other cash from investing | -2.3 | | 253.2 | -1.5 | -1.2 | -0.8 | -1.5 | -8.5 |
| Cash from investing | -256.1 | | 212.1 | -183.9 | -3.3 | -287.5 | 95.1 | 122.0 |
| |
| Option exercises | 5.0 | | 0.3 | 2.6 | 1.6 | 1.8 | 0.0 | 1.9 |
| Other cash from financing | 640.6 | | -50.7 | 4.4 | 2.8 | -5.5 | -62.5 | 3.4 |
| Cash from financing | 635.6 | | -51.0 | 1.8 | 1.2 | -7.3 | -62.5 | 1.5 |
| |
| Free cash flow | -253.8 | | -204.3 | -30.0 | -21.4 | -34.4 | 201.2 | -58.9 |
| Per share (diluted) | ($1.77) | | ($1.44) | ($0.21) | ($0.15) | ($0.24) | $1.25 | ($0.42) |
| |
| Cash paid for interest | 0.5 | | 0.7 | 0.7 | 1.0 | 0.6 | 1.3 | 0.7 |
| Cash paid for income taxes | 0.5 | | 5.0 | | | 0.0 | 0.0 | 0.0 |