| 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 | -287.7 | -328.4 | -440.9 | -394.8 | -265.5 | -282.4 | -187.9 | -126.3 |
| Depreciation and amortization | 7.9 | 13.0 | 17.9 | 21.5 | 21.9 | 16.6 | 11.7 | 6.6 |
| Asset impairment charges | 168.5 | | 168.1 | 47.6 | | | | |
| Stock-based compensation | 41.6 | 40.4 | 107.8 | 114.9 | 124.9 | 127.3 | 60.3 | 56.7 |
| Deferred taxes | | | -0.7 | | -19.9 | -19.7 | -19.4 | -18.8 |
| Change in working capital [+] | 69.2 | 47.6 | 31.1 | 20.9 | 27.0 | 53.4 | 69.1 | 58.9 |
| Accounts receivable | 0.2 | 2.6 | 5.3 | 4.1 | 3.5 | 1.2 | 0.9 | 1.0 |
| Other current assets | 14.9 | | 11.6 | -1.3 | -6.9 | -7.5 | -6.3 | -10.9 |
| Accounts payable | 2.5 | -8.6 | -17.2 | -4.3 | -8.3 | 4.7 | 6.3 | 4.2 |
| Other | 51.6 | | 31.4 | 22.4 | 38.7 | 54.9 | 68.2 | 64.5 |
| Other operating activities | -74.9 | -51.1 | -62.8 | -52.8 | -148.7 | -119.6 | -114.0 | -107.0 |
| Cash from operations | -75.6 | -110.8 | -179.6 | -243.6 | -260.2 | -224.5 | -180.2 | -129.8 |
| |
| Capital expenditures | -13.2 | -1.8 | -1.9 | -3.1 | -2.1 | -2.7 | -3.2 | -2.3 |
| Purchases of property and equipment | -13.2 | | -1.9 | -3.1 | -2.1 | -2.7 | -3.2 | -2.3 |
| Acquisitions | | | | | | | | -84.0 |
| Purchases of short-term investments, net | 388.0 | 433.3 | 313.3 | -326.0 | -427.4 | -544.7 | -504.0 | |
| Purchases of short-term investments | | | -454.1 | -936.9 | -831.5 | -653.5 | -504.0 | |
| Sales of short-term investments | 514.6 | 737.9 | 767.4 | 610.9 | 404.2 | 108.9 | | |
| Other cash from investing | 0.0 | -11.6 | | | | | -52.7 | -54.7 |
| Cash from investing | 374.8 | 419.9 | 311.4 | -327.1 | -564.1 | -684.0 | -643.9 | -141.0 |
| |
| Issuance of common stock, net | | | | | | | 402.1 | |
| Option exercises | 0.5 | | 1.3 | | 4.6 | 4.1 | 3.9 | 3.7 |
| Financing costs | | | | -2.0 | -2.0 | -2.0 | 0.0 | |
| Other cash from financing | -143.6 | -7.2 | -11.3 | 269.8 | 304.1 | 413.2 | 404.4 | 108.3 |
| Cash from financing | -144.1 | -8.3 | -10.6 | 270.2 | 301.5 | 410.4 | 802.7 | 754.3 |
| |
| Free cash flow | -88.8 | -112.6 | -181.5 | -246.7 | -262.3 | -227.1 | -183.4 | -132.1 |
| Per share (diluted) | ($0.42) | ($0.53) | ($0.58) | ($0.81) | ($0.87) | ($0.58) | ($0.48) | ($0.37) |
| |
| Cash paid for interest | 27.4 | | 30.3 | 15.4 | 15.2 | 0.3 | 0.2 | 0.2 |