| In millions, except per share items | Jun-30-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Net income | 115.9 | 91.8 | 50.9 | 97.3 | 42.8 | 70.9 | 78.4 | 56.5 |
| Depreciation and amortization [+] | 3.4 | | 43.6 | 36.8 | 32.1 | 25.5 | 23.5 | 20.9 |
| Depreciation | 1.7 | 1.8 | 39.7 | | 28.4 | | 22.5 | |
| Amortization | 1.7 | | 3.9 | | 3.7 | | 1.0 | |
| Stock-based compensation | | | 32.6 | 29.1 | 26.3 | 27.5 | 31.6 | 28.0 |
| Deferred taxes | | | -19.9 | 0.1 | 15.6 | 0.1 | 0.4 | -0.3 |
| Change in working capital [+] | | | -11.2 | -31.1 | -25.0 | 87.2 | -82.8 | -88.1 |
| Accounts receivable | | | -17.0 | -30.1 | 15.1 | -35.7 | -40.0 | -14.9 |
| Inventories | | | 1.1 | 15.6 | -6.0 | -21.7 | -29.5 | -55.0 |
| Other current assets | | | 15.4 | -97.9 | -3.1 | 8.9 | -6.9 | -20.2 |
| Other | | | -10.7 | 81.3 | -31.0 | 135.7 | -6.4 | 2.0 |
| Other operating activities | -3.4 | | 76.8 | -61.2 | 14.0 | 36.1 | 10.5 | 10.8 |
| Cash from operations | 115.9 | | 172.8 | 71.0 | 105.8 | 247.3 | 61.6 | 27.8 |
| |
| Capital expenditures | 0.0 | | -91.5 | -101.6 | -80.2 | -108.1 | -101.2 | -99.7 |
| Purchases of property and equipment | | | -91.5 | -101.6 | -80.2 | -108.1 | -101.2 | -99.7 |
| Acquisitions | | | | -3.2 | 1.4 | -31.6 | | |
| Purchases of short-term investments, net | | | -53.4 | -304.7 | -431.9 | 168.7 | 468.4 | -12.0 |
| Purchases of short-term investments | | | -597.2 | -546.5 | -932.9 | -368.3 | -369.9 | -802.0 |
| Sales of short-term investments | | | 543.8 | 241.8 | 501.0 | 537.0 | 838.3 | 790.0 |
| Other cash from investing | | | | -2.3 | 14.6 | | -4.0 | -0.5 |
| Cash from investing | 0.0 | | -144.9 | -411.8 | -496.1 | 29.0 | 363.2 | -112.2 |
| |
| Issuance of common stock, net | | | | 10.1 | | 11.6 | | 8.7 |
| Other cash from financing | | | -4.3 | -4.8 | -0.8 | -0.8 | -0.4 | -7.9 |
| Cash from financing | 0.0 | | -4.3 | 5.3 | -0.8 | 10.8 | -0.4 | 0.8 |
| |
| Free cash flow | 115.9 | | 81.3 | -30.6 | 25.6 | 139.2 | -39.6 | -71.9 |
| Per share (diluted) | $0.27 | | $0.19 | ($0.29) | $0.06 | $1.39 | ($0.09) | ($0.69) |
| |