XML 160 R132.htm IDEA: XBRL DOCUMENT v3.10.0.1
Risk Management Activities - Maturity (Details)
$ / shares in Units, $ in Millions
Dec. 31, 2018
CAD ($)
MWh
$ / shares
Dec. 31, 2017
CAD ($)
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities $ 497 $ 595
Borrowings 3,267 3,707
Finance lease liabilities 63 69
Dividends payable (Note 24 and 25) 58 $ 34
Liabilities 5,872  
Within one year    
Disclosure of financial liabilities [line items]    
Liabilities 919  
2019    
Disclosure of financial liabilities [line items]    
Liabilities 740  
2020    
Disclosure of financial liabilities [line items]    
Liabilities 363  
2021    
Disclosure of financial liabilities [line items]    
Liabilities 1,207  
2022    
Disclosure of financial liabilities [line items]    
Liabilities 343  
More than five years    
Disclosure of financial liabilities [line items]    
Liabilities 2,300  
Gross carrying amount    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities 497  
Borrowings 3,234  
Derivative financial liabilities (2)  
Finance lease liabilities 63  
Interest income on debt instruments held 1,343  
Dividends payable (Note 24 and 25) 58  
Gross carrying amount | Within one year    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities 497  
Borrowings 130  
Derivative financial liabilities (3)  
Finance lease liabilities 18  
Interest income on debt instruments held 161  
Dividends payable (Note 24 and 25) 58  
Gross carrying amount | 2019    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities 0  
Borrowings 486  
Derivative financial liabilities (3)  
Finance lease liabilities 16  
Interest income on debt instruments held 152  
Dividends payable (Note 24 and 25) 0  
Gross carrying amount | 2020    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities 0  
Borrowings 91  
Derivative financial liabilities (3)  
Finance lease liabilities 9  
Interest income on debt instruments held 129  
Dividends payable (Note 24 and 25) 0  
Gross carrying amount | 2021    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities 0  
Borrowings 947  
Derivative financial liabilities 7  
Finance lease liabilities 5  
Interest income on debt instruments held 123  
Dividends payable (Note 24 and 25) 0  
Gross carrying amount | 2022    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities 0  
Borrowings 141  
Derivative financial liabilities 0  
Finance lease liabilities 5  
Interest income on debt instruments held 84  
Dividends payable (Note 24 and 25) 0  
Gross carrying amount | More than five years    
Disclosure of financial liabilities [line items]    
Accounts payable and accrued liabilities 0  
Borrowings 1,439  
Derivative financial liabilities 0  
Finance lease liabilities 10  
Interest income on debt instruments held 694  
Dividends payable (Note 24 and 25) 0  
Commodity risk management | Gross carrying amount    
Disclosure of financial liabilities [line items]    
Derivative financial liabilities 679  
Commodity risk management | Gross carrying amount | Within one year    
Disclosure of financial liabilities [line items]    
Derivative financial liabilities 58  
Commodity risk management | Gross carrying amount | 2019    
Disclosure of financial liabilities [line items]    
Derivative financial liabilities 89  
Commodity risk management | Gross carrying amount | 2020    
Disclosure of financial liabilities [line items]    
Derivative financial liabilities 137  
Commodity risk management | Gross carrying amount | 2021    
Disclosure of financial liabilities [line items]    
Derivative financial liabilities 125  
Commodity risk management | Gross carrying amount | 2022    
Disclosure of financial liabilities [line items]    
Derivative financial liabilities 113  
Commodity risk management | Gross carrying amount | More than five years    
Disclosure of financial liabilities [line items]    
Derivative financial liabilities $ 157  
Non-Hedges | Electricity | Commodity risk management | Within one year    
Disclosure of financial liabilities [line items]    
Notional amount | MWh 3,950  
Average Power Prices | $ / shares $ 66.86  
Non-Hedges | Electricity | Commodity risk management | 2019    
Disclosure of financial liabilities [line items]    
Notional amount | MWh 3,465  
Average Power Prices | $ / shares $ 70.75  
Non-Hedges | Electricity | Commodity risk management | 2020    
Disclosure of financial liabilities [line items]    
Notional amount | MWh 3,424  
Average Power Prices | $ / shares $ 74.16  
Non-Hedges | Electricity | Commodity risk management | 2021    
Disclosure of financial liabilities [line items]    
Notional amount | MWh 3,329  
Average Power Prices | $ / shares $ 76.81  
Non-Hedges | Electricity | Commodity risk management | 2022    
Disclosure of financial liabilities [line items]    
Notional amount | MWh 3,329  
Average Power Prices | $ / shares $ 78.74  
Non-Hedges | Electricity | Commodity risk management | More than five years    
Disclosure of financial liabilities [line items]    
Notional amount | MWh 5,966  
Average Power Prices | $ / shares $ 81.59