| In millions, except per share items | Dec-31-11 | Dec-31-10 | Dec-31-09 | Dec-31-08 | Dec-31-07 | Dec-31-06 | Dec-31-05 | Dec-31-04 |
| | 10-K/A | 10-K/A | 10-K/A | 10-K | 10-K/A | 10-K/A | 10-K/A | 10-K |
| Net income | -21.6 | 100.8 | -133.5 | -444.1 | -73.0 | 15.3 | 83.1 | 1.1 |
| Depreciation and amortization | 37.5 | 40.6 | 45.8 | 39.2 | 42.6 | 47.7 | 43.0 | 40.0 |
| Stock-based compensation | 7.6 | 4.2 | 3.8 | 3.2 | 7.0 | 6.5 | 5.5 | |
| Deferred taxes | | | | | | | 29.4 | -9.8 |
| Change in working capital [+] | -77.5 | -4.7 | -2.3 | -33.8 | 44.2 | -5.1 | 69.2 | 24.8 |
| Accounts receivable | -5.0 | 0.8 | 13.6 | 12.6 | -10.4 | -23.2 | 3.9 | -13.8 |
| Other | -72.5 | -5.5 | -15.9 | -46.4 | | | | |
| Other operating activities | 93.1 | -78.0 | 119.6 | 311.6 | | | | |
| Cash from operations | 39.2 | 62.9 | 33.4 | -123.9 | 128.5 | 117.5 | 190.0 | 86.1 |
| |
| Capital expenditures | -11.4 | -15.6 | -19.6 | -173.3 | -237.6 | -188.6 | -132.9 | -111.3 |
| Purchases of property and equipment | -11.4 | -15.6 | -19.6 | -173.3 | -237.6 | -188.6 | -132.9 | -111.3 |
| Acquisitions | | | | | -49.9 | -34.3 | -75.5 | |
| Purchases of short-term investments, net | | 19.6 | 16.0 | -38.9 | | | 14.9 | -14.9 |
| Purchases of short-term investments | | | | -102.8 | -448.9 | -172.6 | -62.8 | -26.4 |
| Sales of short-term investments | | 19.6 | 16.0 | 64.0 | 448.9 | 172.6 | 77.7 | 11.5 |
| Other cash from investing | -119.2 | 172.2 | 88.1 | 39.7 | | | | |
| Cash from investing | -130.6 | 176.3 | 84.4 | -172.5 | -248.5 | -258.9 | -168.5 | -6.3 |
| |
| Repurchase of common stock, net | | | | | | | -8.7 | -63.2 |
| Other cash from financing | 74.2 | -211.7 | -108.0 | 187.7 | | | | |
| Cash from financing | 74.2 | -211.7 | -108.0 | 187.7 | 176.3 | 78.3 | 34.0 | -71.0 |
| |
| Free cash flow | 27.8 | 47.4 | 13.8 | -297.2 | -109.1 | -71.1 | 57.1 | -25.3 |
| Per share (diluted) | $0.52 | $0.81 | $0.27 | ($5.84) | ($2.11) | ($1.44) | $1.20 | ($0.68) |