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Consolidated Statements of Changes in Equity - CAD ($)
$ in Millions
Total
Common shares
Preferred shares
Issued capital
Common shares
Issued capital
Preferred shares
Contributed surplus
Deficit
Deficit
Common shares
Deficit
Preferred shares
Accumulated other comprehensive income (loss)
 [1]
Attributable to shareholders
Attributable to shareholders
Common shares
Attributable to shareholders
Preferred shares
Attributable to non-controlling interests
Balance, beginning of year at Dec. 31, 2022 $ 1,989     $ 2,863 $ 942 $ 41 $ (2,514)     $ (222) $ 1,110     $ 879
Changes in equity [abstract]                            
Net earnings 796           695       695     101
Other comprehensive income (loss)                            
Net gains on translating net assets of foreign operations, net of hedges and tax 3                 3 3      
Net gains (losses) on derivatives designated as cash flow hedges, net of tax 99                 99 99     0
Net actuarial gains on defined benefits plans, net of tax (5)                 (5) (5)      
Intercompany FVTOCI investments 0                 25 25     (25)
Total comprehensive income (loss) 893           695     122 817     76
Dividends (51) $ (65) $ (51)         $ (65) $ (51)     $ (65) $ (51)  
Shares purchased under normal course issuer bid ("NCIB") (87)     (80)     (7)       (87)      
Changes in non-controlling interests in TransAlta Renewables (Note 4) (809)     510     (625)     (64) (179)     (630)
(Provision) reversal of repurchase of shares under the automatic share purchase plan (19)     (19)             (19)      
Share-based payment plans and stock options exercised 11     11             11      
Dividends recognised as distributions to non-controlling interests (198)                         (198)
Balance, end of year at Dec. 31, 2023 1,664     3,285 942 41 (2,567)     (164) 1,537     127
Changes in equity [abstract]                            
Net earnings 239           229       229     10
Other comprehensive income (loss)                            
Net gains on translating net assets of foreign operations, net of hedges and tax 2                 2 2      
Net gains (losses) on derivatives designated as cash flow hedges, net of tax 194                 194 194     0
Net actuarial gains on defined benefits plans, net of tax 9                 9 9      
Total comprehensive income (loss) 444           229     205 434     10
Dividends (52) $ (71) $ (52)         $ (71) $ (52)     $ (71) $ (52)  
Shares purchased under normal course issuer bid ("NCIB") (143)     (146)     3       (143)      
(Provision) reversal of repurchase of shares under the automatic share purchase plan 19     19             19      
Share-based payment plans and stock options exercised 22     21   1         22      
Dividends recognised as distributions to non-controlling interests (40)                         (40)
Balance, end of year at Dec. 31, 2024 $ 1,843     $ 3,179 $ 942 $ 42 $ (2,458)     $ 41 $ 1,746     $ 97
[1]
(1)Refer to Note 30 for details on components of and changes in, accumulated other comprehensive income (loss).