XML 199 R119.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Financial Instruments Fair value of financial assets and liabilities measured at other than fair value (Details) - CAD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of fair value measurement of liabilities [line items]    
Financial liabilities $ 3,212 $ 3,267
Long-term debt    
Disclosure of fair value measurement of liabilities [line items]    
Financial liabilities 3,070 3,204
Exchangeable securities    
Disclosure of fair value measurement of liabilities [line items]    
Financial liabilities 326  
Recurring fair value measurement | Long-term debt | Financial liabilities at fair value through profit or loss, category [member]    
Disclosure of fair value measurement of liabilities [line items]    
Financial liabilities 3,157 3,181
Recurring fair value measurement | Exchangeable securities | Financial liabilities at fair value through profit or loss, category [member]    
Disclosure of fair value measurement of liabilities [line items]    
Financial liabilities 342  
Recurring fair value measurement | Level II | Long-term debt | Financial liabilities at fair value through profit or loss, category [member]    
Disclosure of fair value measurement of liabilities [line items]    
Financial liabilities 3,157 $ 3,181
Recurring fair value measurement | Level II | Exchangeable securities | Financial liabilities at fair value through profit or loss, category [member]    
Disclosure of fair value measurement of liabilities [line items]    
Financial liabilities $ 342