| In millions, except per share items | Jun-25-23 | Dec-25-22 | Jun-26-22 | Mar-27-22 | Dec-26-21 | Sep-26-21 | Jun-27-21 | Mar-28-21 |
| | 8-K | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | -113.3 | -90.5 | 32.4 | -66.5 | -88.7 | -70.1 | -149.0 | -108.1 |
| Depreciation and amortization | | | 31.9 | 30.4 | 32.9 | 34.6 | 32.3 | 32.4 |
| Stock-based compensation | | | 15.7 | 15.2 | 15.4 | 14.6 | 12.9 | 12.9 |
| Deferred taxes | | | | 0.3 | 0.2 | 0.2 | 0.4 | -1.8 |
| Change in working capital [+] | | | -82.8 | -2.3 | -19.4 | -51.9 | 49.5 | -21.0 |
| Accounts receivable | | | -27.8 | -12.4 | -3.6 | -10.5 | -11.8 | -2.2 |
| Inventories | | | -7.2 | -20.6 | -18.5 | -22.5 | -19.2 | -4.3 |
| Other current assets | | | 2.9 | 2.4 | -6.9 | 1.2 | 8.2 | -26.4 |
| Accounts payable | | | 17.9 | 8.5 | 8.0 | -5.2 | -5.5 | 17.3 |
| Other | | | -68.6 | 19.8 | 1.6 | -14.9 | 77.8 | -5.4 |
| Other operating activities | | -0.4 | -28.0 | -5.5 | 27.1 | 10.1 | 0.3 | 58.8 |
| Cash from operations | | -90.9 | -30.8 | -28.4 | -32.5 | -62.5 | -53.6 | -26.8 |
| |
| Capital expenditures [+] | | 0.0 | -109.4 | -133.9 | -142.3 | -259.3 | -176.5 | -136.5 |
| Purchases of property and equipment | | | -109.4 | -133.9 | -142.3 | -259.3 | -176.5 | -136.5 |
| Sales of property and equipment | | | 0.4 | | 2.2 | 0.5 | 2.1 | 0.1 |
| Purchases of intangible assets | | | -1.5 | -1.6 | -1.6 | -1.0 | -2.3 | -1.7 |
| Purchases of short-term investments, net | | | 42.0 | -316.7 | 90.2 | 177.0 | -16.6 | -185.2 |
| Purchases of short-term investments | | | -66.8 | -378.4 | -21.1 | -8.7 | -132.9 | -256.3 |
| Sales of short-term investments | | | 108.8 | 61.7 | 111.3 | 185.7 | 116.3 | 71.1 |
| Other cash from investing | | | 55.5 | 157.7 | | 50.8 | 84.2 | 33.6 |
| Cash from investing | | 0.0 | -13.0 | -294.5 | -51.5 | -32.0 | -109.1 | -289.7 |
| |
| Issuance of common stock, net | | | -727.6 | 750.0 | 11.5 | | 539.7 | |
| Other cash from financing | | | 735.2 | -126.7 | -3.6 | -22.9 | -533.2 | 483.1 |
| Cash from financing | | 0.0 | 7.6 | 623.3 | 7.9 | -22.9 | 6.5 | 483.1 |
| |
| Free cash flow | | -90.9 | -140.2 | -162.3 | -174.8 | -321.8 | -230.1 | -163.3 |
| Per share (diluted) | | ($0.73) | ($1.17) | ($1.31) | ($1.49) | ($2.78) | ($2.05) | ($1.45) |
| |
| Cash paid for income taxes | | | -4.4 | | | | | |