| In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 125.0 | 551.0 | 128.0 | -41.0 | 510.0 | 2.0 | 162.0 | 43.0 |
| Depreciation and amortization [+] | | | | | 86.0 | 80.0 | 85.0 | 100.0 |
| Depreciation | | | | | 86.0 | 53.0 | 47.0 | 48.0 |
| Amortization of intangible assets | | | | | | 27.0 | 38.0 | 52.0 |
| Asset impairment charges | | | | | | 1.0 | | |
| Stock-based compensation | | | | | | 12.0 | 10.0 | 8.0 |
| Deferred taxes | | | | | | 20.0 | 60.0 | 29.0 |
| Change in working capital [+] | 22.0 | 8.0 | 16.0 | 5.0 | | -124.0 | -5.0 | -16.0 |
| Accounts receivable | | | | | | | -44.0 | -34.0 |
| Other current assets | 22.0 | 15.0 | 14.0 | 6.0 | 1.0 | -11.0 | 5.0 | -1.0 |
| Accounts payable | | | | | | 6.0 | 18.0 | -1.0 |
| Accrued expenses | | | | | | -30.0 | 1.0 | 1.0 |
| Deferred revenues | | | | | | | 38.0 | 39.0 |
| Income taxes | | | | | | -5.0 | 2.0 | -3.0 |
| Other | | -7.0 | 2.0 | -1.0 | -1.0 | -84.0 | -25.0 | -17.0 |
| Other operating activities | 92.0 | -361.0 | 20.0 | 191.0 | -392.0 | 157.0 | 86.0 | |
| Cash from operations | 239.0 | 198.0 | 164.0 | 155.0 | 204.0 | 148.0 | 398.0 | 289.0 |
| |
| Capital expenditures [+] | 22.0 | 26.0 | 25.0 | 46.0 | 68.0 | -46.0 | -40.0 | -35.0 |
| Purchases of property and equipment | 22.0 | 26.0 | 25.0 | 46.0 | 68.0 | -46.0 | -40.0 | -35.0 |
| Sales of property and equipment | 5.0 | 6.0 | 1.0 | 2.0 | 4.0 | 8.0 | 14.0 | 2.0 |
| Acquisitions | 113.0 | 36.0 | 506.0 | 187.0 | 13.0 | -34.0 | -92.0 | -58.0 |
| Sales of short-term investments, net [+] | | | | | 2.0 | | 59.0 | 40.0 |
| Purchases of short-term investments | | | | | 2.0 | | -6.0 | -11.0 |
| Sales of short-term investments | | | | | | | 65.0 | 51.0 |
| Other cash from investing | -271.0 | -115.0 | -1,051.0 | -483.0 | -166.0 | -7.0 | -39.0 | -5.0 |
| Cash from investing | -131.0 | -47.0 | -519.0 | -248.0 | -79.0 | -79.0 | -98.0 | -56.0 |
| |
| Cash dividends paid | | | | 242.0 | | | | -35.0 |
| Issuance of common stock, net | 553.0 | 118.0 | 57.0 | 7.0 | 115.0 | -47.0 | 16.0 | 673.0 |
| Financing costs | | 3.0 | 10.0 | | | -34.0 | -5.0 | -24.0 |
| Other cash from financing | -1,176.0 | -1,107.0 | 281.0 | -598.0 | -262.0 | -89.0 | -402.0 | -974.0 |
| Cash from financing | -623.0 | -992.0 | 328.0 | -349.0 | -147.0 | -102.0 | -381.0 | -312.0 |
| |
| Free cash flow | 261.0 | 224.0 | 189.0 | 201.0 | 272.0 | 102.0 | 358.0 | 254.0 |
| Per share (diluted) | $2.06 | $1.68 | $1.39 | $1.48 | $2.01 | $0.74 | $2.62 | $2.23 |