XML 188 R153.htm IDEA: XBRL DOCUMENT v3.22.4
Credit Facilities, Long-Term Debt and Lease Liabilities - Restrictions on Non-Recourse Debt and Security (Details)
$ in Millions, $ in Millions
 3 Months Ended 12 Months Ended
Jul. 20, 2018
CAD ($)
Dec. 31, 2021
CAD ($)
Dec. 31, 2022
CAD ($)
Dec. 31, 2022
AUD ($)
Dec. 31, 2021
CAD ($)
Dec. 31, 2020
CAD ($)
Disclosure of detailed information about borrowings [line items]            
Other borrowings   $ 735 $ 739   $ 735  
PP&E   5,320 5,556   5,320 $ 5,822
Intangible assets   256 252   256 313
Annual cash payments $ 40   40   40 $ 40
Annual cash payments, net   37        
TransAlta OCP            
Disclosure of detailed information about borrowings [line items]            
Restricted cash   17 17   17  
Renewable generation facilities            
Disclosure of detailed information about borrowings [line items]            
PP&E   1,500 1,500   1,500  
Intangible assets   78 70   78  
Non-recourse debt            
Disclosure of detailed information about borrowings [line items]            
Other borrowings   1,900 1,800   1,900  
Restricted cash   67 50   67  
Non-recourse debt | Secured by first rate ranking charge over subsidiaries            
Disclosure of detailed information about borrowings [line items]            
Notional amount   1,500 1,400   1,500  
Non-recourse debt | Secured by equity interests of the issuer            
Disclosure of detailed information about borrowings [line items]            
Notional amount   103 94   103  
Restricted Use Debt            
Disclosure of detailed information about borrowings [line items]            
Proceeds received     8 $ 9    
Kent Hills Wind Bonds            
Disclosure of detailed information about borrowings [line items]            
Reserve account balance   0 65   0  
Secured Debt | TransAlta OCP            
Disclosure of detailed information about borrowings [line items]            
Notional amount   $ 263 $ 241   $ 263