In millions, except per share items | Dec-31-22 | Dec-05-22 | Dec-31-21 | Dec-05-21 | Dec-31-20 | Dec-05-20 | Dec-31-19 | Dec-31-18 |
| 10-K | 8-K | 10-K | 8-K | 10-K | 8-K | 10-K | 10-K |
Net income | 293.2 | 293.2 | 76.7 | 76.7 | -75.2 | -75.2 | -152.6 | -158.9 |
Depreciation and amortization [+] | 3.8 | | 4.3 | | 4.3 | | 8.9 | 3.6 |
Depreciation | 3.8 | | 4.3 | | 4.3 | | 8.9 | 3.6 |
Stock-based compensation | | | | | | | | 23.5 |
Change in working capital [+] | -390.7 | | 155.4 | | 45.1 | | 15.2 | 35.2 |
Accounts receivable | -15.7 | | -109.2 | | -13.8 | | -5.2 | -2.9 |
Inventories | | | | | | | | -18.7 |
Other current assets | | | | | | | | -2.4 |
Accounts payable | | | | | | | | 3.4 |
Accrued expenses | -24.8 | | 39.7 | | 2.8 | | -9.4 | 12.6 |
Deferred revenues | -349.9 | | 311.7 | | 38.2 | | | |
Other | -0.3 | | -86.8 | | 17.9 | | 29.7 | 43.1 |
Other operating activities | 156.4 | | 99.1 | | -66.4 | | 7.3 | -34.7 |
Cash from operations | 62.7 | | 335.5 | | -92.3 | | -121.3 | -131.3 |
|
Capital expenditures [+] | 7.1 | | 9.5 | | 4.1 | | 22.4 | -4.2 |
Purchases of property and equipment | 7.1 | | 9.5 | | 4.1 | | 22.4 | -4.2 |
Sales of property and equipment | 1.0 | | 1.0 | | 6.9 | | | |
Acquisitions | | | | | | | | -11.0 |
Purchases of short-term investments, net | 954.8 | | 352.6 | | 350.4 | | 417.0 | 70.7 |
Purchases of short-term investments | 632.3 | | 164.9 | | 201.8 | | 215.2 | -213.8 |
Sales of short-term investments | 322.5 | | 187.6 | | 148.6 | | 201.8 | 284.5 |
Other cash from investing | -1,278.9 | | -348.8 | | -387.8 | | -482.2 | |
Cash from investing | -316.0 | | 14.2 | | -26.5 | | -42.8 | 55.5 |
|
Issuance of common stock, net | | | 28.2 | | 108.5 | | 65.9 | |
Option exercises | 1.4 | | 0.8 | | 0.7 | | 0.6 | 0.6 |
Other cash from financing | 21.0 | | 28.5 | | 1.6 | | 89.0 | 99.7 |
Cash from financing | 19.5 | | 55.8 | | 109.5 | | 154.4 | 99.1 |
|
Free cash flow | 69.9 | | 345.0 | | -88.2 | | -98.9 | -135.5 |
Per share (diluted) | $0.46 | | $2.59 | | ($0.87) | | ($1.37) | ($2.17) |
|
Cash paid for interest | 5.6 | | 9.8 | | 16.5 | | 12.1 | 6.6 |