| In millions, except per share items | Dec-25-21 | Dec-26-20 | Dec-28-19 | Dec-29-18 | Dec-30-17 | Dec-31-16 | Dec-26-15 | Dec-27-14 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 167.3 | -13.8 | -69.7 | -32.2 | 32.8 | 3.0 | 0.3 | 8.7 |
| Depreciation and amortization [+] | 48.6 | 52.7 | 58.9 | 26.0 | 9.2 | 10.4 | 11.3 | 12.6 |
| Depreciation | 13.2 | 14.0 | 19.3 | 8.9 | 5.0 | 3.5 | | |
| Amortization | 35.4 | 38.7 | 39.6 | 17.2 | 4.2 | 6.9 | | |
| Asset impairment charges | 0.1 | 11.2 | | | | | | |
| Stock-based compensation | | | | | | 7.1 | 6.8 | 6.4 |
| Deferred taxes | 1.0 | -5.3 | -5.4 | -8.2 | -3.8 | -1.1 | 0.2 | 0.8 |
| Change in working capital [+] | -86.3 | -22.7 | 28.7 | 3.1 | -22.9 | 4.8 | 4.5 | -13.1 |
| Accounts receivable | -59.1 | -20.2 | 21.2 | 5.8 | -3.3 | -4.6 | 9.0 | -18.7 |
| Inventories | -35.9 | -15.0 | 0.0 | 2.0 | -12.2 | 4.6 | -5.7 | -3.4 |
| Other current assets | 1.7 | 1.2 | -6.0 | 0.1 | 1.0 | -2.0 | 2.4 | |
| Accounts payable | 17.3 | 15.1 | -3.1 | -7.1 | 4.2 | 5.7 | 3.4 | 0.1 |
| Accrued expenses | -0.4 | 0.1 | 5.3 | 0.2 | 1.0 | -1.4 | -3.6 | 6.2 |
| Deferred revenues | | | | | | | -3.1 | 2.2 |
| Income taxes | -9.9 | -3.8 | 11.3 | 2.0 | -13.5 | 2.4 | 2.2 | 0.4 |
| Other operating activities | -33.0 | 27.5 | 4.8 | 45.7 | 24.4 | 0.3 | | |
| Cash from operations | 97.7 | 49.7 | 17.3 | 34.4 | 39.8 | 24.5 | 21.5 | 19.7 |
| |
| Capital expenditures [+] | -12.0 | -18.7 | -18.0 | -5.0 | -6.1 | -3.5 | -6.6 | -1.5 |
| Purchases of property and equipment | -12.0 | -18.7 | -18.0 | -5.0 | -6.1 | -3.5 | -6.6 | -1.5 |
| Sales of property and equipment | 0.2 | 17.0 | 1.8 | | | | | |
| Acquisitions | | | | -339.1 | | | | |
| Purchases of short-term investments, net | -69.2 | -19.7 | -0.3 | 20.8 | 10.7 | -30.3 | -0.5 | 0.0 |
| Purchases of short-term investments | -204.7 | -19.7 | -0.3 | -38.7 | -37.0 | -50.6 | -0.7 | -1.0 |
| Sales of short-term investments | 135.5 | | | 59.5 | 47.7 | 20.2 | 0.2 | 1.0 |
| Other cash from investing | 120.9 | 3.0 | | -322.3 | -7.0 | -32.9 | 38.1 | 10.0 |
| Cash from investing | 39.9 | -18.4 | -16.5 | -645.6 | -2.5 | -66.7 | 31.0 | 8.6 |
| |
| Cash dividends paid | | -5.0 | -9.8 | -6.9 | -6.6 | -6.4 | -6.2 | -6.1 |
| Issuance of common stock, net | 215.8 | | | | | | | |
| Other cash from financing | -209.1 | -33.1 | 1.6 | 329.1 | 8.7 | -0.4 | 1.2 | 1.9 |
| Cash from financing | 6.7 | -38.1 | -8.2 | 322.1 | 2.1 | -6.7 | -5.0 | -4.2 |
| |
| Free cash flow | 85.7 | 31.1 | -0.7 | 29.5 | 33.7 | 21.1 | 14.9 | 18.2 |
| Per share (diluted) | $1.77 | $0.74 | ($0.02) | $0.93 | $1.16 | $0.77 | $0.56 | $0.70 |
| |
| Cash paid for income taxes | 22.7 | 5.8 | 14.9 | 6.2 | 7.1 | 6.8 | -0.3 | 1.0 |