XML 131 R103.htm IDEA: XBRL DOCUMENT v3.10.0.1
Net Other Operating (Income) Losses (Details) - CAD ($)
$ in Millions
 12 Months Ended
Jul. 20, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of types of insurance contracts [line items]        
Alberta off-coal agreement, annual cash payments, gross $ 40 $ 40 $ 40 $ 0
Alberta off-coal agreement, annual cash payments, net $ 37      
Gains (losses) on disposals of investments   157 0 0
Mississauga cogeneration facility NUG Contract   0 9 191
Discounted revenue     207  
Contract expenses and termination charges     16  
Accelerated depreciation     46  
Cash flow hedge unrealized gains (losses) from AOCI recognized in profit or loss     14  
Insurance recoveries   7 0 3
Business interruption [member]        
Disclosure of types of insurance contracts [line items]        
Insurance recoveries       2
Wind Generation | Replacement and Refurbishment [Member]        
Disclosure of types of insurance contracts [line items]        
Insurance recoveries       $ 1
Canadian Coal | Equipment Repair [Member]        
Disclosure of types of insurance contracts [line items]        
Insurance recoveries   1    
Wyoming Wind [Member]        
Disclosure of types of insurance contracts [line items]        
Insurance recoveries   $ 6    
Mississauga Cogeneration Facility Contract [Member]        
Disclosure of types of insurance contracts [line items]        
Mississauga cogeneration facility NUG Contract     $ 191