XML 95 R75.htm IDEA: XBRL DOCUMENT v3.22.0.1
REVENUE - Narrative (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]      
Mark-to-market gains (losses) $ 59 $ 265 $ 346
Revenue recognized 305    
Increase (decrease) in contract with customers, liability 397    
Remaining performance obligation 59,800    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01      
Revenue from Contract with Customer [Abstract]      
Remaining performance obligation $ 7,400    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Remaining performance obligation, period 1 year