| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 8-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 397.4 | 145.4 | 134.0 | 161.1 | -11.6 | -45.2 | -67.5 | -22.1 |
| Depreciation and amortization | 58.8 | 32.4 | 18.1 | 14.1 | 9.7 | 9.0 | 10.6 | 10.5 |
| Asset impairment charges | 1.2 | | | 1.1 | 1.6 | 1.7 | 3.2 | |
| Stock-based compensation | 216.8 | 114.3 | 42.5 | 20.2 | 11.4 | 6.7 | 10.3 | 12.7 |
| Deferred taxes | 3.6 | -31.2 | -17.1 | -73.4 | 0.1 | -1.4 | 0.7 | 0.6 |
| Change in working capital [+] | -60.6 | -90.1 | -23.0 | -147.9 | 24.4 | -25.7 | 16.3 | -19.9 |
| Accounts receivable | -107.6 | -151.2 | -34.3 | -68.7 | -13.5 | -4.8 | -18.0 | -2.5 |
| Inventories | -75.3 | -29.3 | -9.7 | -15.8 | 9.7 | 6.0 | 8.8 | -19.2 |
| Other current assets | | -26.9 | -14.6 | -14.3 | -3.1 | -1.2 | -4.8 | -5.3 |
| Deferred revenues | 122.2 | | | | | | | 9.7 |
| Other | | 117.2 | 35.7 | -49.1 | 31.3 | -25.6 | 30.3 | -2.6 |
| Other operating activities | 127.7 | 181.2 | 61.8 | 163.8 | -19.4 | 26.5 | -6.6 | -3.0 |
| Cash from operations | 744.8 | 352.0 | 216.3 | 139.1 | 16.1 | -28.4 | -33.0 | -21.2 |
| |
| Capital expenditures | -46.4 | -52.3 | -20.6 | -14.8 | -4.2 | -4.1 | -12.2 | -12.5 |
| Purchases of property and equipment | -46.4 | -52.3 | -20.6 | -14.8 | -4.2 | -4.1 | -12.2 | -12.5 |
| Purchases of intangible assets | | -0.3 | | | | | -0.7 | -0.2 |
| Acquisitions | -62.2 | -235.7 | | | -15.0 | | | |
| Purchases of short-term investments, net | -247.3 | -900.0 | | | | | | |
| Purchases of short-term investments | -907.4 | -935.0 | | | | | | |
| Sales of short-term investments | 660.1 | 35.0 | | | | | | |
| Other cash from investing | -16.0 | -31.4 | -5.0 | | | | 1.1 | 0.3 |
| Cash from investing | -371.9 | -1,219.5 | -25.6 | -14.8 | -19.2 | -4.1 | -11.8 | -12.5 |
| |
| Repurchase of common stock, net | | -500.0 | | | 19.8 | 26.4 | 16.1 | |
| Option exercises | | 7.5 | 8.4 | 5.0 | 2.8 | 0.5 | 1.1 | 4.0 |
| Other cash from financing | | 816.9 | 200.1 | 70.8 | 63.6 | 17.4 | 19.4 | 24.6 |
| Cash from financing | 0.0 | 309.4 | 191.7 | 65.9 | 80.6 | 43.3 | 34.4 | 20.6 |
| |
| Free cash flow | 698.4 | 299.8 | 195.8 | 124.3 | 12.0 | -32.6 | -45.1 | -33.7 |
| Per share (diluted) | $4.84 | $2.10 | $1.38 | $0.94 | $0.12 | ($0.39) | ($0.89) | ($0.75) |
| |
| Cash paid for interest | | 0.7 | 1.9 | 2.7 | 6.3 | 5.8 | 2.7 | 0.4 |