| In millions, except per share items | Dec-31-22 | Dec-25-21 | Dec-26-20 | Dec-28-19 | Dec-29-18 | Dec-30-17 | Dec-31-16 | Dec-26-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -76.0 | -170.8 | -206.7 | -386.6 | -214.3 | -194.5 | -23.9 | 51.4 |
| Depreciation and amortization [+] | 83.8 | 83.6 | 100.1 | 119.8 | 100.5 | 66.0 | 61.5 | 35.8 |
| Depreciation | 46.1 | 46.5 | 52.3 | 60.0 | 47.7 | 39.4 | 35.6 | |
| Amortization | 37.7 | 37.1 | 47.8 | 59.9 | 52.8 | 26.6 | 25.9 | |
| Asset impairment charges | | | | | | 1.9 | 11.3 | |
| Stock-based compensation | 61.0 | 51.8 | 49.5 | 43.3 | 43.4 | 45.7 | 40.5 | 32.6 |
| Change in working capital [+] | -128.8 | -2.6 | -133.7 | -33.9 | -65.2 | 1.2 | -53.5 | 2.1 |
| Accounts receivable | -69.0 | -45.8 | 32.2 | -35.4 | -21.1 | 25.8 | 33.9 | -16.0 |
| Inventories | -89.5 | -28.0 | 71.4 | -42.8 | -8.6 | 2.7 | -64.1 | -17.1 |
| Other current assets | -34.0 | -0.4 | -36.1 | -93.6 | -13.5 | -8.2 | -5.5 | -3.2 |
| Accounts payable | 88.3 | 32.3 | -93.4 | 83.3 | -0.5 | -4.8 | -28.3 | 19.2 |
| Accrued expenses | | | | | -21.5 | -14.4 | -11.0 | 8.4 |
| Deferred revenues | | | | | | | 21.4 | 10.8 |
| Other | -24.4 | 39.3 | -107.7 | 54.7 | | | | |
| Other operating activities | 22.4 | 66.2 | 78.5 | 90.1 | 36.5 | 57.8 | 2.5 | 11.3 |
| Cash from operations | -37.6 | 28.1 | -112.3 | -167.4 | -99.1 | -21.9 | 38.4 | 133.2 |
| |
| Capital expenditures | -46.1 | -41.4 | -39.0 | -30.2 | -37.7 | -58.0 | -43.3 | -42.0 |
| Purchases of property and equipment | -46.1 | -41.4 | -39.0 | -30.2 | -37.7 | -58.0 | -43.3 | -42.0 |
| Acquisitions | | | | -10.0 | -102.9 | | | -144.4 |
| Sales of short-term investments, net [+] | | | | 26.6 | 152.2 | 3.2 | 18.8 | 26.5 |
| Purchases of short-term investments | | | | | -3.0 | -160.2 | -124.1 | -186.7 |
| Sales of short-term investments | | | | 26.6 | 155.2 | 163.4 | 142.9 | 213.2 |
| Other cash from investing | | | | 1.0 | 1.0 | | 16.5 | 68.5 |
| Cash from investing | -46.1 | -41.4 | -39.0 | -12.6 | 12.6 | -54.8 | -8.0 | -91.5 |
| |
| Issuance of common stock, net | 15.2 | 16.5 | 17.1 | 12.1 | 17.7 | 18.0 | 17.6 | 25.4 |
| Financing costs | -12.5 | | -2.5 | -0.3 | | | | |
| Other cash from financing | 54.7 | -118.0 | 314.6 | 59.6 | 190.2 | -1.5 | -20.4 | -4.4 |
| Cash from financing | 82.3 | -101.5 | 334.2 | 71.9 | 207.9 | 16.5 | -2.8 | 21.0 |
| |
| Free cash flow | -83.6 | -13.3 | -151.3 | -197.6 | -136.8 | -80.0 | -5.0 | 91.2 |
| Per share (diluted) | ($0.39) | ($0.06) | ($0.80) | ($1.10) | ($0.87) | ($0.54) | ($0.03) | $0.64 |
| |
| Cash paid for interest | 14.8 | 18.3 | 15.6 | 9.6 | 3.6 | 2.6 | 2.8 | 2.6 |
| Cash paid for income taxes | 15.1 | 18.7 | 5.0 | 16.9 | 6.7 | | | |