XML 157 R179.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Capital Disclosure of components of capital (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jun. 28, 2018
Dec. 31, 2016
Disclosure of components of capital [Line Items]          
Long-term debt $ 3,212 $ 3,267      
Increase (decrease) in financial liabilities (55)        
Exchangeable securities 326 0      
Increase (decrease) in exchangeable securities 326        
Equity 4,062 4,134 $ 4,385    
Preferred shares       $ 33  
Contributed surplus 42 11      
Deficit (1,455) (1,496)      
Accumulated other comprehensive income 454 481      
Non-controlling interests 1,101 1,137      
Cash and cash equivalents (411) (89) (314)   $ (305)
Increase (decrease) in cash and cash equivalents (322) 225 (9)    
Current restricted cash and cash equivalents (32) (66)      
Fair value asset of hedging instruments on long-term debt (7) (10)      
Increase (decrease) in hedging instruments, liabilities 3        
Total capital 7,172 7,275      
Increase (decrease) in capital (103)        
Common shares          
Disclosure of components of capital [Line Items]          
Equity 2,978 3,059      
Increase (decrease) in equity (81)        
Preferred shares          
Disclosure of components of capital [Line Items]          
Equity 942 942      
Increase (decrease) in equity 0        
Contributed surplus          
Disclosure of components of capital [Line Items]          
Equity 42 11 10    
Increase (decrease) in equity 31        
Deficit          
Disclosure of components of capital [Line Items]          
Equity (1,455) (1,496) (1,209)    
Increase (decrease) in equity 41        
Accumulated other comprehensive income          
Disclosure of components of capital [Line Items]          
Equity [1] 454 481 489    
Increase (decrease) in equity (27)        
Non-controlling interests          
Disclosure of components of capital [Line Items]          
Equity 1,101 1,137 $ 1,059    
Increase (decrease) in equity (36)        
TransAlta OCP          
Disclosure of components of capital [Line Items]          
Current restricted cash and cash equivalents (10) $ (27)      
Increase (decrease) in restricted cash and cash equivalents $ 17        
[1] (1) Refer to Note 28 for details on components of, and changes in, accumulated other comprehensive income (loss).