| In millions, except per share items | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 |
| | 10-K | 10-K | 10-K | 10-K |
| Net income | 119.8 | 19.1 | -2.0 | -17.3 |
| Depreciation and amortization [+] | 1.9 | 1.0 | 0.1 | 0.1 |
| Depreciation | 1.9 | 1.0 | 0.1 | 0.1 |
| Stock-based compensation | 57.0 | 51.5 | 5.2 | 4.2 |
| Deferred taxes | 7.8 | 3.1 | | |
| Change in working capital [+] | -18.7 | -27.3 | -10.9 | -6.5 |
| Restricted cash | -33.6 | -3.2 | | |
| Other | 14.9 | -24.1 | -10.9 | -6.5 |
| Other operating activities | -9.7 | -0.8 | 1.3 | 0.0 |
| Cash from operations | 158.1 | 46.7 | -6.4 | -19.6 |
| |
| Capital expenditures | 0.0 | 0.0 | 0.0 | 0.0 |
| Purchases of short-term investments | -43.4 | | | |
| Purchases of short-term investments | -43.4 | | | |
| Other cash from investing | -29.3 | -43.6 | | |
| Cash from investing | -72.6 | -43.6 | 0.0 | 0.0 |
| |
| Cash dividends paid | -78.0 | -19.1 | | |
| Repurchase of common stock, net | -105.2 | | | |
| Financing costs | -1.2 | | | |
| Other cash from financing | 72.4 | 118.0 | 7.3 | 24.2 |
| Cash from financing | -109.4 | 98.9 | 7.3 | 24.2 |
| |
| Free cash flow | 158.1 | 46.7 | -6.4 | -19.6 |
| Per share (diluted) | $0.82 | $0.25 | ($0.03) | ($0.10) |
| |
| Cash paid for interest | 0.3 | | | |