| 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 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -124.7 | -146.3 | -98.8 | -53.8 | -55.5 | -45.5 | -49.0 | -99.1 |
| Depreciation and amortization | 41.0 | 33.5 | 22.6 | 16.5 | 11.1 | 7.6 | 6.7 | 5.4 |
| Asset impairment charges | | | | | | | | 0.5 |
| Stock-based compensation | 119.9 | 102.6 | 63.9 | 40.7 | 27.6 | 19.5 | 17.3 | 10.7 |
| Deferred taxes | -1.4 | 0.5 | 0.7 | -0.6 | -0.1 | -2.9 | 0.1 | 0.1 |
| Change in working capital [+] | -13.0 | -30.5 | -40.9 | -33.9 | -4.7 | -21.7 | -6.0 | 29.0 |
| Accounts receivable | -9.1 | -25.5 | -24.4 | -14.8 | -1.7 | -25.2 | -6.2 | -18.4 |
| Other current assets | -2.2 | -3.4 | -9.0 | -13.7 | -0.3 | -0.1 | -3.5 | -1.8 |
| Accounts payable | 8.0 | -2.1 | -2.4 | 0.1 | 3.7 | -2.3 | 1.6 | -2.3 |
| Accrued expenses | 3.7 | 19.2 | 8.6 | 4.8 | 6.0 | 6.8 | 1.6 | 6.7 |
| Deferred revenues | | | | | | | | 44.9 |
| Other | -13.4 | -18.8 | -13.8 | -10.3 | -12.4 | -0.9 | 0.6 | -0.1 |
| Other operating activities | 56.4 | 94.2 | 57.4 | 29.8 | 27.7 | 56.2 | 40.0 | 51.5 |
| Cash from operations | 78.2 | 53.9 | 4.9 | -1.4 | 6.1 | 13.3 | 9.1 | -1.9 |
| |
| Capital expenditures [+] | -37.5 | -18.9 | -19.9 | -35.5 | -16.1 | -6.0 | -4.5 | -4.1 |
| Purchases of property and equipment | -20.4 | -9.0 | -13.8 | -29.4 | -12.8 | -4.8 | -4.5 | -4.1 |
| Capitalized product costs | -17.1 | -9.9 | -6.1 | -6.1 | -3.3 | -1.2 | | |
| Acquisitions | | -358.4 | -125.8 | -14.6 | -14.5 | -14.7 | | -38.8 |
| Other cash from investing | -2.5 | 51.9 | -10.5 | 66.9 | -163.2 | -1.5 | -39.0 | |
| Cash from investing | -40.0 | -325.4 | -156.3 | 16.8 | -193.7 | -22.2 | -43.5 | -42.9 |
| |
| Issuance of common stock, net | | | | | 30.9 | | | |
| Option exercises | 15.3 | 13.6 | 14.9 | 15.7 | 11.2 | 8.8 | 6.6 | 1.3 |
| Financing costs | -0.1 | -0.3 | -0.4 | | | | | |
| Other cash from financing | 22.6 | 277.4 | 215.4 | 24.5 | 216.5 | 16.0 | 7.8 | 96.1 |
| Cash from financing | 7.4 | 264.1 | 200.9 | 8.8 | 236.2 | 7.3 | 1.2 | 94.8 |
| |
| Free cash flow | 57.8 | 44.9 | -8.9 | -30.8 | -6.7 | 8.5 | 4.6 | -6.0 |
| Per share (diluted) | $0.69 | $0.63 | ($0.29) | ($0.76) | ($0.22) | $0.17 | $0.11 | ($0.24) |
| |
| Cash paid for interest | 6.7 | 7.3 | 5.5 | 2.8 | | | 0.0 | 1.4 |
| Cash paid for income taxes | 1.6 | 3.3 | 0.3 | 0.4 | 0.2 | 0.8 | 0.6 | 0.3 |