XML 35 R155.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Common Shares - Issued and Outstanding (Details) - CAD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of classes of share capital [line items]    
Proceeds from exercise of options $ 2 $ 0
Common shares    
Dilutive effect of share options on number of ordinary shares 0.1 0.0
Common shares    
Disclosure of classes of share capital [line items]    
Issued and outstanding, end of year $ 3,059 $ 3,094
Proceeds from issuing shares (83) (35)
Issued Capital, Amount Before Receivables Under Employee Share Purchase Plan 2,978 3,059
Issued and outstanding, end of year $ 2,978 $ 3,059
Common shares    
Issued and outstanding, beginning of year 284.6 287.9
Shares issued (7.7) (3.3)
Issued and outstanding, end of year 277.0 284.6