| In millions, except per share items | Dec-31-09 | Dec-31-08 | Dec-31-07 | Dec-31-06 | Dec-31-05 | Dec-31-04 | Dec-31-03 | Dec-31-02 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 0.0 | 0.1 | 0.0 | 4.1 | 0.3 | -34.0 | -56.0 | -29.8 |
| Depreciation and amortization | 49.2 | 41.4 | 35.6 | 36.7 | 32.6 | 27.5 | 21.9 | 19.6 |
| Stock-based compensation | 18.2 | 17.3 | 11.3 | 14.1 | 2.4 | 1.8 | 0.2 | 0.1 |
| Change in working capital [+] | 22.5 | 5.6 | -3.3 | -32.4 | -14.5 | -12.1 | 24.2 | 44.3 |
| Accounts receivable | 1.8 | -20.9 | -5.7 | -14.5 | -19.0 | -11.5 | -10.7 | 16.4 |
| Inventories | | | 1.0 | 1.2 | -0.6 | | | 0.0 |
| Accounts payable | | | | | | | 13.8 | |
| Other | 20.6 | 26.5 | 1.4 | | | | | |
| Other operating activities | 16.6 | 9.1 | 26.6 | 4.1 | -6.3 | 13.6 | 6.2 | -2.0 |
| Cash from operations | 106.4 | 73.4 | 70.2 | 26.6 | 14.5 | -3.2 | -3.4 | 32.2 |
| |
| Capital expenditures [+] | -50.7 | -43.3 | -37.5 | -29.2 | -39.4 | -30.5 | -34.2 | -21.7 |
| Purchases of property and equipment | -21.2 | -25.1 | -16.6 | -15.1 | -19.3 | -15.3 | -16.0 | -12.9 |
| Capitalized product costs | -29.5 | -18.2 | -20.9 | -14.1 | -20.1 | -15.2 | -18.2 | -8.8 |
| Acquisitions | | | | | | -5.5 | | |
| Purchases of short-term investments, net | 23.7 | 51.6 | -79.4 | -52.1 | -37.5 | -0.1 | -0.4 | |
| Purchases of short-term investments | | -102.0 | -241.1 | -85.2 | -118.0 | -164.1 | -73.8 | |
| Sales of short-term investments | 23.7 | 153.6 | 161.7 | 33.1 | 80.5 | 163.9 | 73.4 | |
| Other cash from investing | -1.0 | -105.1 | 14.3 | -8.4 | -0.3 | | | |
| Cash from investing | -28.0 | -96.8 | -102.6 | -89.7 | -77.2 | -36.1 | -34.7 | -21.7 |
| |
| Other cash from financing | -63.6 | 110.6 | 12.9 | | | | | |
| Cash from financing | -63.6 | 110.6 | 12.9 | 27.7 | 17.0 | 9.6 | 6.3 | 4.0 |
| |
| Free cash flow | 85.2 | 48.3 | 53.6 | 11.5 | -4.8 | -18.6 | -19.4 | 19.4 |
| Per share (diluted) | $497.69 | $278.55 | $308.84 | ($0.05) | ($493.21) | ($0.72) | ($0.83) | $0.24 |