| In millions, except per share items | Sep-30-14 | Jun-30-14 | Mar-31-14 | Dec-31-13 | Sep-30-13 | Jun-30-13 | Mar-31-13 | Dec-31-12 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Net income | 64.5 | -59.3 | 54.7 | 60.7 | 35.7 | 12.7 | 79.8 | 79.8 |
| Depreciation and amortization | 122.9 | 118.3 | 114.2 | 115.2 | 115.4 | 113.7 | 112.3 | 105.8 |
| Stock-based compensation | 17.8 | 17.1 | 16.9 | 16.2 | 12.6 | 8.8 | 6.4 | 5.8 |
| Deferred taxes | | | | -0.3 | | | | 0.4 |
| Change in working capital | -20.0 | -5.7 | 2.5 | 7.4 | 16.8 | 18.2 | 16.0 | 23.3 |
| Other | -20.0 | -5.7 | 2.5 | 7.4 | 16.8 | 18.2 | 16.0 | 23.3 |
| Other operating activities | 9.9 | 118.0 | 22.3 | 2.9 | 30.3 | 48.8 | -22.6 | 12.2 |
| Cash from operations | 194.8 | 188.1 | 210.4 | 202.1 | 211.0 | 202.5 | 192.3 | 227.2 |
| |
| Capital expenditures | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Acquisitions | -70.8 | -166.5 | -159.5 | -128.2 | -344.6 | -470.2 | -454.2 | -456.5 |
| Purchases of short-term investments, net | -2.4 | -1.3 | -1.3 | -1.7 | 0.4 | | | |
| Purchases of short-term investments | -10.0 | -10.7 | -10.4 | -10.2 | -4.3 | | | |
| Sales of short-term investments | 7.6 | 9.4 | 9.1 | 8.5 | 4.6 | | | |
| Other cash from investing | -140.5 | -122.4 | -99.6 | -88.2 | -92.3 | 138.5 | -109.6 | -135.8 |
| Cash from investing | -213.6 | -290.1 | -260.4 | -218.2 | -436.5 | -331.7 | -563.8 | -592.3 |
| |
| Issuance of common stock, net | | | | | | | 162.0 | |
| Financing costs | | | | -7.5 | -14.4 | -17.9 | -19.7 | -17.8 |
| Other cash from financing | 7.0 | 84.9 | 52.0 | -10.0 | 211.9 | 108.6 | 184.1 | 199.8 |
| Cash from financing | 8.9 | 88.8 | 57.7 | -2.4 | 226.4 | 126.3 | 365.8 | 379.5 |
| |
| Free cash flow | 194.8 | 188.1 | 210.4 | 202.1 | 211.0 | 202.5 | 192.3 | 227.2 |
| Per share (diluted) | | $19.95 | $7.71 | $6.04 | $4.99 | $4.84 | $8.03 | $12.80 |