| In millions, except per share items | Dec-31-14 | Dec-31-13 | Dec-31-12 | Dec-31-11 | Dec-31-10 | Dec-31-09 | Dec-31-08 | Dec-31-07 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 126.1 | 170.2 | 186.8 | 121.2 | 146.7 | 210.8 | 197.7 | 106.7 |
| Depreciation and amortization | 92.3 | 92.3 | 85.5 | 78.9 | 52.2 | 51.5 | 48.8 | 49.3 |
| Stock-based compensation | 25.6 | 25.9 | 28.4 | 19.8 | 14.1 | 11.0 | 6.0 | 8.1 |
| Tax benefit from stock-based compensation | -2.4 | -6.8 | -4.1 | -4.4 | -0.8 | | -0.4 | |
| Deferred taxes | -36.5 | 3.8 | 8.6 | 20.8 | 2.0 | -7.0 | -2.6 | -1.7 |
| Change in working capital [+] | -20.1 | -244.5 | -195.4 | -134.1 | 64.7 | 6.1 | -31.4 | -87.6 |
| Accounts receivable | 33.7 | -164.6 | -85.0 | -106.5 | -7.7 | 82.1 | -57.9 | 2.4 |
| Inventories | 8.5 | -162.3 | -140.9 | -85.2 | 53.9 | -20.7 | -51.2 | -71.6 |
| Other current assets | -7.8 | -5.2 | 0.4 | -22.7 | | | | |
| Income taxes | -2.7 | -16.0 | 21.5 | -44.0 | | | | |
| Other | -51.8 | 103.6 | 8.6 | 124.3 | 18.5 | -55.3 | 77.7 | -18.4 |
| Other operating activities | 69.8 | -107.7 | -17.0 | 5.9 | 96.7 | -142.6 | 16.7 | 141.2 |
| Cash from operations | 254.8 | -66.8 | 92.8 | 108.1 | 375.6 | 129.8 | 234.8 | 216.0 |
| |
| Capital expenditures [+] | -58.0 | -82.6 | -73.3 | -50.8 | -32.5 | -41.1 | -40.2 | -23.7 |
| Purchases of property and equipment | -58.0 | -82.6 | -73.3 | -50.8 | -32.5 | -41.1 | -40.2 | -23.7 |
| Sales of property and equipment | 4.9 | 2.4 | 0.9 | 0.5 | 0.3 | 1.2 | 0.3 | |
| Acquisitions | -1.0 | | -48.8 | -283.5 | -68.9 | -12.7 | -91.4 | -8.1 |
| Other cash from investing | -19.9 | -3.3 | -2.9 | -12.2 | -5.0 | -10.0 | -5.0 | 5.8 |
| Cash from investing | -74.0 | -83.5 | -124.1 | -346.0 | -106.1 | -62.6 | -136.3 | -26.0 |
| |
| Repurchase of common stock, net | -5.6 | -1.5 | | -505.0 | -70.5 | | -150.2 | |
| Option exercises | 4.4 | 4.1 | 2.8 | 5.9 | 1.4 | 2.1 | 1.4 | |
| Financing costs | -0.3 | -5.1 | -0.5 | -16.1 | | | | |
| Other cash from financing | -165.6 | 232.8 | 29.5 | 441.5 | 3.6 | 4.0 | 3.0 | -140.8 |
| Cash from financing | -175.3 | 232.3 | 27.2 | -53.3 | -68.3 | 1.9 | -148.6 | -140.8 |
| |
| Free cash flow | 196.8 | -149.4 | 19.5 | 57.3 | 343.1 | 88.7 | 194.6 | 192.3 |
| Per share (diluted) | $2.55 | ($1.94) | $0.26 | $0.73 | $4.21 | $1.08 | $2.32 | $2.25 |