| Annual · values | 2021 | 2020 | 2019 | 2018 |
|---|---|---|---|---|
| Operating Cash Flow | 485.51 M USD | -390.05 M USD | 522.05 M USD | 655.24 M USD |
| Depreciation & Amortization | 289.12 M USD | 358.55 M USD | 444.24 M USD | 326.46 M USD |
| Stock-Based Compensation | — | — | — | — |
| Capital Expenditures | 93.16 M USD | -7.86 M USD | -77.84 M USD | -70.42 M USD |
| Cash Flow from Investing | — | — | — | — |
| Cash Flow from Financing | — | — | — | — |
| Dividends Paid | — | — | — | — |
| Stock Buybacks | — | — | — | — |
| Free Cash Flow | 198.57 M USD | -156.64 M USD | -403.55 M USD | -546.80 M USD |