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Consolidated Statements of Earnings (Loss) - CAD ($) shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Profit or loss [abstract] |  |  |
Revenues | $ 2,721 | $ 2,101 | $ 2,347
Fuel and purchased power | 1,054 | 805 | 881
Carbon compliance | 178 | 163 | 205
Gross margin | 1,489 | 1,133 | 1,261
Operations, maintenance, and administration | 511 | 472 | 475
Depreciation and amortization | 529 | 654 | 590
Asset impairment charge | 648 | 84 | 25
Gain on termination of Keephills 3 coal rights contract | 0 | 0 | (88)
Taxes, other than income taxes | 32 | 33 | 29
Termination of Sundance B and C PPAs | 0 | 0 | (56)
Net other operating loss (income) | 8 | (11) | (49)
Operating income (loss) | (239) | (99) | 335
Equity income | 9 | 1 | 0
Finance lease income | 25 | 7 | 6
Net interest expense | (245) | (238) | (179)
Foreign exchange gain (loss) | 16 | 17 | (15)
Gain on sale of assets and other (Note 4 and 18) | 54 | 9 | 46
Earnings (loss) before income taxes | (380) | (303) | 193
Income tax expense (recovery) | 45 | (50) | 17
Net earnings (loss) | (425) | (253) | 176
Net earnings (loss) attributable to: |  |  |
TransAlta shareholders | (537) | (287) | 82
Non-controlling interests (Note 12) | 112 | 34 | 94
Net earnings (loss) | (425) | (253) | 176
Preferred share dividends (Note 25) | 39 | 49 | 30
Net earnings (loss) attributable to common shareholders | $ (576) | $ (336) | $ 52
Weighted average number of common shares outstanding in the year (in shares) | 271,000 | 275,000 | 283,000
Net earnings (loss) per share attributable to common shareholders, basic (in CAD per share) | $ (2.13) | $ (1.22) | $ 0.18
Net earnings (loss) per share attributable to common shareholders, diluted (in CAD per share) | $ (2.13) | $ (1.22) | $ 0.18

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