| 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 | 130.7 | 118.4 | 108.8 | 129.0 | 104.1 | 80.5 | 67.6 | 55.9 |
| Depreciation and amortization [+] | 81.1 | 76.8 | 71.8 | 65.6 | 57.7 | 51.7 | 38.5 | 29.6 |
| Depreciation | 33.4 | 34.9 | 33.8 | 31.7 | 31.8 | 29.7 | 25.4 | 20.0 |
| Amortization of intangible assets | 47.7 | 41.9 | 38.0 | 33.9 | 25.9 | 22.0 | 13.1 | 9.6 |
| Stock-based compensation | 10.2 | 6.5 | 1.9 | 9.4 | 9.7 | 9.0 | 9.9 | 7.2 |
| Deferred taxes | -25.8 | -2.7 | 9.8 | 19.8 | 4.8 | 18.3 | -0.1 | 5.8 |
| Change in working capital [+] | -76.9 | -40.6 | 33.0 | -36.2 | 1.6 | -62.2 | -26.3 | 0.4 |
| Accounts receivable | -52.2 | -29.2 | 62.5 | -18.8 | -7.2 | -35.8 | -29.0 | -11.3 |
| Inventories | -69.0 | -37.9 | 44.0 | -5.7 | -7.5 | -23.7 | -2.9 | 15.6 |
| Accounts payable | 47.8 | 39.6 | -61.0 | -3.7 | 35.8 | 8.5 | 16.1 | 10.4 |
| Other | -3.5 | -13.1 | -12.5 | -8.0 | -19.5 | -11.2 | -10.5 | -14.3 |
| Other operating activities | 23.0 | 67.3 | 26.7 | -77.0 | -23.3 | 9.0 | -21.7 | 13.3 |
| Cash from operations | 142.3 | 225.7 | 252.0 | 110.6 | 154.6 | 106.3 | 67.9 | 112.2 |
| |
| Capital expenditures [+] | -87.6 | -54.1 | -34.3 | -37.9 | -39.8 | -37.9 | -37.1 | -37.7 |
| Purchases of property and equipment | -87.6 | -54.1 | -34.3 | -37.9 | -39.8 | -37.9 | -37.1 | -37.7 |
| Sales of property and equipment | 1.2 | 5.7 | 1.5 | 2.1 | 2.9 | 2.2 | 2.3 | 1.5 |
| Acquisitions | -329.7 | -224.5 | -4.5 | -365.9 | -57.5 | -104.2 | -232.0 | -150.9 |
| Other cash from investing | | | | | | | | 2.0 |
| Cash from investing | -416.1 | -272.9 | -37.3 | -401.7 | -94.4 | -139.9 | -266.8 | -185.1 |
| |
| Cash dividends paid | -13.1 | -12.8 | -12.8 | -12.7 | -13.1 | -12.7 | -11.8 | -11.2 |
| Issuance of common stock, net | -7.7 | | | | -20.0 | 179.1 | -4.3 | -7.7 |
| Other cash from financing | 291.4 | 93.6 | -194.6 | 300.2 | -15.2 | -131.7 | 211.0 | 102.8 |
| Cash from financing | 270.6 | 80.8 | -207.4 | 287.5 | -48.3 | 34.7 | 194.9 | 83.9 |
| |
| Free cash flow | 54.7 | 171.6 | 217.7 | 72.7 | 114.8 | 68.4 | 30.8 | 74.5 |
| Per share (diluted) | $1.70 | $5.35 | $6.78 | $2.27 | $3.57 | $2.14 | $1.03 | $2.50 |
| |
| Cash paid for interest | 14.6 | 10.0 | 14.2 | 21.9 | 16.0 | 13.1 | 10.4 | 7.7 |