| In millions, except per share items | Dec-31-13 | Dec-31-12 | Dec-31-11 | Dec-31-10 | Jan-21-10 | Dec-31-09 | Dec-31-08 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 61.0 | 79.8 | 88.3 | -12.1 | 31.9 | -115.4 | -268.5 |
| Depreciation and amortization | 115.2 | 105.8 | 95.0 | 2.1 | 66.5 | 17.0 | 49.3 |
| Stock-based compensation | 6.9 | 3.3 | 1.4 | | | | |
| Deferred taxes | -0.3 | 0.4 | 0.8 | -0.1 | | | |
| Change in working capital | 3.4 | 12.8 | 9.7 | | | | -5.0 |
| Other | 3.4 | 12.8 | 9.7 | | | | -5.0 |
| Other operating activities | 16.0 | 25.2 | -82.6 | 11.8 | -2.5 | 163.3 | 299.5 |
| Cash from operations | 202.1 | 227.2 | 112.6 | 1.8 | 95.9 | 64.9 | 75.3 |
| |
| Capital expenditures | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Acquisitions | -128.2 | -468.0 | -3.0 | -77.8 | -891.9 | -43.3 | -0.4 |
| Sales of short-term investments, net [+] | -1.7 | | | | | 6.2 | 1.8 |
| Purchases of short-term investments | -10.2 | | | | | | |
| Sales of short-term investments | 8.5 | | | | | 6.2 | 1.8 |
| Other cash from investing | -88.2 | -124.3 | -69.1 | -0.3 | -65.0 | -18.4 | -138.6 |
| Cash from investing | -218.2 | -592.3 | -72.1 | -78.1 | -956.9 | -55.5 | -137.2 |
| |
| Issuance of common stock, net | | | | 279.8 | | | |
| Financing costs | -2.0 | -8.9 | -2.3 | | | | |
| Other cash from financing | -4.4 | 370.6 | -27.5 | -201.2 | 903.4 | -13.3 | 30.2 |
| Cash from financing | -2.4 | 379.5 | -25.2 | 78.5 | 903.4 | -13.3 | 30.2 |
| |
| Free cash flow | 202.1 | 227.2 | 112.6 | 1.8 | 95.9 | 64.9 | 75.3 |
| Per share (diluted) | | $6.44 | $3.92 | | | | |