XML 196 R171.htm IDEA: XBRL DOCUMENT v3.10.0.1
Related Parties - Summary of Compensation of Key Management Personnel (Detail) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Compensation Of Key Management Personnel [abstract]    
Short-term employee benefits $ 65 $ 78
Post-employment benefits 5 5
Share-based payments 50 59
Termination benefits 5 6
Other long-term benefits 2 2
Total $ 127 $ 150