| In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 224.9 | 97.1 | 89.6 | 119.8 | 85.7 | 55.6 | 42.2 | 30.7 |
| Depreciation and amortization [+] | 104.8 | 73.3 | 62.8 | 55.1 | 33.5 | 24.4 | 16.8 | 10.4 |
| Depreciation | 48.5 | 32.4 | 26.9 | 20.8 | 14.2 | 11.0 | 8.0 | 6.0 |
| Amortization of intangible assets | 56.3 | 40.9 | 35.9 | 34.2 | 19.4 | 13.4 | 8.8 | 4.5 |
| Stock-based compensation | 22.9 | 16.0 | 15.4 | 14.0 | 10.4 | 6.5 | 4.7 | 3.3 |
| Deferred taxes | -3.9 | 8.1 | 5.6 | 0.8 | -6.5 | -0.6 | -1.8 | 1.7 |
| Change in working capital [+] | -110.1 | -45.4 | 13.7 | 7.3 | -23.7 | 10.0 | 3.9 | -0.3 |
| Accounts receivable | -14.4 | -29.2 | 5.8 | 26.7 | -11.2 | 11.3 | 9.0 | -1.9 |
| Inventories | -232.5 | -34.6 | 19.7 | 0.1 | -35.3 | -12.5 | 3.0 | -1.7 |
| Other current assets | -13.1 | -2.4 | -12.9 | 1.7 | -7.6 | -1.6 | 0.5 | -1.5 |
| Other | 149.9 | 20.8 | 1.1 | -21.1 | 30.3 | 12.8 | -8.7 | 4.9 |
| Other operating activities | 13.5 | 11.2 | 5.4 | 3.0 | 0.4 | 1.3 | 1.1 | 0.5 |
| Cash from operations | 252.1 | 160.2 | 192.4 | 200.0 | 99.9 | 97.1 | 66.9 | 46.3 |
| |
| Capital expenditures [+] | -64.8 | -32.1 | -27.7 | -34.5 | -22.5 | -15.4 | -8.0 | -6.5 |
| Purchases of property and equipment | -64.8 | -32.1 | -27.7 | -34.5 | -22.5 | -15.4 | -8.0 | -6.5 |
| Sales of property and equipment | 0.2 | 0.2 | 4.4 | 6.5 | 1.2 | 0.3 | 0.1 | 0.1 |
| Acquisitions | -508.1 | -306.0 | -56.0 | -343.3 | -251.9 | -138.9 | -140.2 | -72.1 |
| Other cash from investing | -2.0 | | | | | 0.0 | 0.6 | -0.1 |
| Cash from investing | -574.7 | -337.9 | -79.2 | -371.4 | -273.1 | -154.0 | -147.4 | -78.6 |
| |
| Cash dividends paid | -27.0 | -23.6 | -5.8 | | | | | |
| Repurchase of common stock, net | -48.9 | -23.1 | -3.8 | -107.6 | 93.3 | -5.2 | -22.6 | -13.9 |
| Option exercises | 9.9 | 0.6 | 0.0 | | | 1.9 | 1.9 | 0.0 |
| Financing costs | -15.7 | -0.1 | -7.2 | -7.6 | -1.0 | -0.4 | -2.0 | -0.1 |
| Other cash from financing | 470.8 | 130.4 | 21.7 | 275.4 | 75.3 | 69.9 | 103.0 | 46.2 |
| Cash from financing | 400.7 | 83.1 | 19.3 | 175.5 | 169.6 | 63.2 | 80.5 | 32.4 |
| |
| Free cash flow | 187.3 | 128.1 | 164.7 | 165.5 | 77.4 | 81.7 | 58.9 | 39.8 |
| Per share (diluted) | $8.02 | $5.55 | $7.08 | $6.81 | $3.14 | $3.57 | $2.53 | $2.48 |