| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Cash flows from operating activities | | | | | | | |
| Net income | 184.8 | 92.7 | -264.0 | -204.3 | -78.2 | -31.7 | |
| |
| Adjustments for: | | | | | | | |
| Depreciation and amortization | 143.6 | 99.5 | 33.3 | 8.6 | 4.0 | 3.2 | |
| (Earnings) losses of equity method investees | 472.2 | -14.4 | | | | | |
| Dividends received from equity method investees | | | | | | | |
| Change in market value of derivatives | -136.8 | -8.7 | | | | | |
| Deferred taxes | -279.5 | -8.8 | 2.8 | 0.4 | -0.3 | 0.5 | |
| Asset impairment expense | 50.7 | | | | | | |
| Other | -14.2 | -11.2 | 4.3 | 1.2 | 0.4 | 1.3 | |
| Changes in operating assets and liabilities: | | | | | | | |
| (Increase) in receivables | -139.9 | -123.6 | -26.8 | -19.8 | -9.5 | -3.1 | |
| (Increase) in inventories | -7.9 | -11.2 | 23.2 | -50.3 | -4.8 | -3.5 | |
| Decrease (increase) in other assets | -30.1 | -1.8 | -35.9 | -39.3 | -28.3 | -21.7 | |
| Decrease in right-of-use assets | 63.6 | 28.6 | 41.5 | | | | |
| Increase in accounts payable/accrued liabilities | 67.7 | 17.5 | 55.5 | 3.0 | 12.2 | -0.1 | |
| (Decrease) in lease liabilities | -63.5 | -36.1 | -42.1 | | | | |
| Increase (decrease) in other liabilities | 5.3 | -21.3 | 7.2 | 10.7 | 1.7 | -1.4 | |
| Net cash provided by operating activities | 355.1 | 84.8 | -125.6 | -234.3 | -93.2 | -54.9 | |
| |
| Cash flows from investing activities | | | | | | | |
| Capital expenditures | -1,174.0 | -669.3 | -157.0 | -377.1 | -181.2 | -28.7 | |
| Sale of equity method investment | 500.1 | | | | | | |
| Other non-cash items | -1.8 | -9.4 | -0.6 | 0.9 | 0.7 | | |
| Net cash used in investing activities | -82.7 | -2,273.6 | -157.6 | -376.2 | -184.5 | -29.9 | |
| |
| Cash flows from financing activities | | | | | | | |
| Payment of deferred financing costs | -17.6 | -37.8 | -36.5 | -8.3 | -14.0 | | |
| Repayment of debt | -1,520.8 | -461.0 | -1,490.0 | -5.0 | -76.5 | -5.8 | |
| Payments related to tax withholdings for share-based compensation | -72.6 | -30.1 | -6.4 | | | | |
| Payment of dividends | -99.1 | -88.8 | -33.7 | | | | |
| Net cash provided by financing activities | 322.0 | 1,816.9 | 819.5 | 602.6 | 260.2 | 14.0 | |
| Impact of changes in foreign exchange rates on cash and cash equivalents | -3.3 | 6.5 | | | | | |
| |
| Supplemental disclosure of non-cash investing and financing activities: | | | | | | | |
| Changes in accounts payable and accrued liabilities associated with construction in progress and property, plant and equipment additions | 284.4 | 108.8 | -12.8 | -48.2 | 74.3 | 8.0 | |
| Cash and cash equivalents | | | | | | | |
| Current restricted cash | | | | | | | |