| In millions, except per share items | Sep-30-19 | Jun-30-19 | Mar-31-19 | Dec-31-18 | Sep-30-18 | Jun-30-18 | Mar-31-18 | Dec-31-17 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Net income | -22.5 | -8.0 | -2.4 | 7.6 | 5.2 | 1.0 | 0.3 | -4.0 |
| Depreciation and amortization [+] | 69.8 | 58.2 | 46.9 | 41.8 | 35.3 | 29.1 | 22.9 | 21.7 |
| Depreciation | 15.7 | 15.1 | 14.6 | 13.7 | 12.9 | 12.2 | 11.4 | 11.5 |
| Amortization | 54.1 | 43.2 | 32.3 | 28.1 | 22.4 | 16.9 | 11.6 | 10.3 |
| Asset impairment charges | 6.1 | | | | | | 1.7 | 1.0 |
| Stock-based compensation | 19.2 | 18.8 | 18.1 | 17.6 | 17.0 | 15.3 | 13.7 | 12.7 |
| Deferred taxes | -15.5 | -12.5 | -6.3 | -16.6 | -16.6 | -16.7 | -18.2 | -15.4 |
| Change in working capital [+] | 18.1 | 9.3 | 6.0 | -0.3 | 27.9 | 29.2 | 27.2 | 37.0 |
| Accounts receivable | 7.6 | 3.8 | -1.7 | -6.0 | -5.7 | -4.6 | -4.0 | 1.8 |
| Other current assets | -2.4 | -2.6 | -9.2 | -3.7 | -2.8 | -1.1 | 0.7 | 0.3 |
| Accounts payable | 3.1 | 1.1 | -4.0 | -7.4 | -1.1 | 0.5 | -2.5 | 5.0 |
| Accrued expenses | 0.6 | -3.2 | 10.0 | 5.6 | 4.5 | 3.9 | 2.7 | -1.0 |
| Deferred revenues | 18.6 | 17.3 | 12.9 | 11.3 | 8.4 | 5.7 | 5.2 | 6.2 |
| Other | -9.3 | -7.1 | -1.9 | -0.2 | 24.7 | 24.7 | 25.1 | 24.8 |
| Other operating activities | 12.9 | 9.9 | 6.8 | 2.9 | -21.9 | -21.9 | -20.7 | -21.9 |
| Cash from operations | 88.1 | 75.8 | 69.0 | 53.6 | 47.7 | 37.6 | 26.9 | 31.2 |
| |
| Capital expenditures [+] | -12.7 | -11.4 | -12.6 | -13.1 | -15.3 | -15.1 | -14.1 | -17.4 |
| Purchases of property and equipment | -12.7 | -11.4 | -12.6 | -13.1 | -15.3 | -15.1 | -14.1 | -17.4 |
| Sales of property and equipment | 0.3 | 0.4 | 0.6 | 0.9 | 0.7 | 0.9 | 1.3 | 1.3 |
| Purchases of intangible assets | | | | | -7.0 | | -2.5 | -1.3 |
| Acquisitions | -621.7 | -622.0 | -489.6 | | | -154.2 | -154.7 | |
| Purchases of short-term investments | | | | -1.4 | | | | -5.0 |
| Purchases of short-term investments | | | | -1.4 | | | | -5.0 |
| Other cash from investing | 4.6 | 5.1 | | 4.0 | 6.2 | 2.9 | -0.9 | 0.5 |
| Cash from investing | -630.9 | -633.8 | -502.2 | -160.0 | -165.1 | -173.0 | -175.8 | -91.7 |
| |
| Issuance of common stock, net | | | | 177.8 | 199.3 | | | |
| Option exercises | 3.4 | 3.5 | 3.3 | 3.8 | 4.2 | 4.9 | 4.3 | 6.0 |
| Other cash from financing | 469.2 | 399.0 | 444.4 | 2.9 | 3.8 | 85.6 | 195.1 | 148.6 |
| Cash from financing | 444.3 | 573.2 | 618.9 | 176.8 | 198.9 | 80.7 | 175.8 | 127.6 |
| |
| Free cash flow | 75.3 | 64.4 | 56.4 | 40.5 | 32.3 | 22.5 | 12.9 | 13.8 |
| Per share (diluted) | $2.18 | $1.84 | $1.68 | $1.26 | $1.05 | $0.79 | $0.45 | $0.50 |
| |
| Cash paid for interest | 15.1 | 12.6 | | 4.8 | 3.0 | 2.6 | | |
| Cash paid for income taxes | 3.6 | 0.6 | 0.4 | 0.5 | 0.2 | 0.7 | 0.7 | 0.8 |