| 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 | 67.1 | 352.1 | 300.4 | 327.9 | 271.2 | 302.0 | 168.6 | -101.3 |
| Depreciation and amortization [+] | 191.0 | 187.2 | 187.8 | 165.7 | 151.6 | 144.9 | 118.0 | 115.9 |
| Depreciation | 132.1 | 129.3 | 131.0 | 112.5 | 104.1 | 103.7 | 91.3 | 96.9 |
| Amortization of intangible assets | 58.9 | 57.9 | 56.8 | 53.2 | 47.4 | 41.2 | 26.7 | 19.0 |
| Stock-based compensation | 6.1 | 5.7 | 6.3 | 6.3 | 6.4 | 10.2 | 13.4 | 48.0 |
| Deferred taxes | -3.8 | 65.0 | 14.4 | 69.8 | -7.1 | -146.5 | 10.1 | |
| Change in working capital [+] | -27.4 | -11.9 | 10.0 | -73.7 | 21.6 | 34.7 | 29.5 | -252.2 |
| Accounts receivable | 41.6 | -59.3 | 61.3 | -53.6 | 49.6 | -22.7 | -47.9 | -87.2 |
| Inventories | -64.3 | 4.6 | 3.8 | -5.3 | -7.4 | -0.5 | -2.4 | -1.8 |
| Deferred revenues | 33.4 | 19.1 | -25.7 | 30.5 | 14.8 | 13.9 | 16.6 | -51.8 |
| Income taxes | 6.8 | -8.7 | 3.3 | 1.8 | 9.4 | 24.7 | 5.1 | -174.3 |
| Other | -44.9 | 32.4 | -32.7 | -47.1 | -44.9 | 19.4 | 58.1 | 62.9 |
| Other operating activities | 2.7 | -395.6 | -308.2 | -330.8 | -156.6 | -77.3 | -78.3 | 260.2 |
| Cash from operations | 235.6 | 202.4 | 210.7 | 165.2 | 287.0 | 268.1 | 261.3 | 70.7 |
| |
| Capital expenditures | -82.7 | -162.5 | -69.6 | -93.5 | -98.2 | -60.4 | -66.6 | -136.9 |
| Purchases of property and equipment | -82.7 | -162.5 | -69.6 | -93.5 | -98.2 | -60.4 | -66.6 | -136.9 |
| Acquisitions | -130.1 | -351.9 | -20.1 | -179.4 | -111.5 | -299.9 | -245.1 | -159.3 |
| Sales of short-term investments, net [+] | 61.5 | 17.5 | 73.8 | 11.8 | 24.1 | | 48.3 | |
| Purchases of short-term investments | -40.5 | -48.0 | -20.0 | -7.5 | -42.7 | | 48.3 | |
| Sales of short-term investments | 102.0 | 65.5 | 93.8 | 19.3 | 66.7 | | | |
| Other cash from investing | -32.8 | 2.3 | 215.3 | 24.4 | -45.3 | -81.7 | -47.9 | -129.4 |
| Cash from investing | -184.1 | -494.6 | 199.4 | -236.7 | -231.0 | -442.0 | -311.3 | -425.6 |
| |
| Cash dividends paid | -30.7 | -30.1 | -30.0 | -29.6 | -28.6 | -28.3 | -27.3 | -53.7 |
| Repurchase of common stock, net | -71.4 | -55.7 | -161.8 | -2.1 | -118.0 | -50.8 | -108.9 | -23.0 |
| Other cash from financing | 84.0 | 116.8 | -12.2 | 50.4 | -45.7 | -21.0 | 93.2 | 418.9 |
| Cash from financing | -18.1 | 31.0 | -204.0 | 18.7 | -192.4 | -100.1 | -43.1 | 342.2 |
| |
| Free cash flow | 152.9 | 39.9 | 141.1 | 71.7 | 188.8 | 207.7 | 194.6 | -66.2 |
| Per share (diluted) | $31.62 | $8.03 | $27.45 | $13.45 | $35.16 | $37.41 | $34.83 | ($11.56) |