XML 142 R112.htm IDEA: XBRL DOCUMENT v3.25.0.1
Non-Controlling Interests - Earnings of Subsidiaries with Non-Controlling Interests (Details) - CAD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2023
Oct. 04, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of subsidiaries [line items]          
Revenue     $ 2,845 $ 3,355 $ 2,976
Net earnings     239 796 161
Total comprehensive income (loss)     444 893 (263)
Amounts attributable to the non-controlling interests:          
Net earnings (loss)     10 101 111
Total comprehensive income (loss)     10 76 55
Dividend declared         25
TransAlta Cogeneration, L.P.          
Disclosure of subsidiaries [line items]          
Revenue     167 290 347
Net earnings     9 121 143
Total comprehensive income (loss)     9 121 143
Amounts attributable to the non-controlling interests:          
Net earnings (loss)     9 80 91
Total comprehensive income (loss)     9 80 91
Dividends paid to non-controlling interests     40 $ 148 87
Kent Hills Wind L.P.          
Disclosure of subsidiaries [line items]          
Revenue $ 7   34    
Net earnings 2   7    
Total comprehensive income (loss) 2   7    
Amounts attributable to the non-controlling interests:          
Net earnings (loss) 0   1    
Total comprehensive income (loss) $ 0   $ 1    
TransAlta Renewables, Inc. Including Kent Hills Wind LP          
Disclosure of subsidiaries [line items]          
Revenue   $ 303     560
Net earnings   56     74
Total comprehensive income (loss)   (7)     (67)
Amounts attributable to the non-controlling interests:          
Net earnings (loss)   21     20
Total comprehensive income (loss)   (4)     (36)
Dividends paid to non-controlling interests   $ 75     $ 100