XML 102 R140.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
COMMITMENTS, CONTINGENCIES AND GUARANTEES - Narrative (Details) - CAD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other Commitments        
Purchase commitment   $ 236 $ 207 $ 214
Contingencies        
Amount accrued related to operating facilities for the estimated expenses to remediate the sites $ 39 39 $ 40  
Canadian Natural Gas Pipelines | Capital expenditures        
Other Commitments        
Purchase commitment   4,500    
U.S. Natural Gas Pipelines | Capital expenditures        
Other Commitments        
Purchase commitment   100    
Mexico Natural Gas Pipelines | Capital expenditures        
Other Commitments        
Purchase commitment   200    
Liquids Pipelines | Capital expenditures        
Other Commitments        
Purchase commitment   200    
Power and Storage | Capital expenditures        
Other Commitments        
Purchase commitment   $ 700    
KKR and AIMCo | Disposal group, disposed of by sale, not discontinued operations | Coastal GasLink pipeline project        
Other Commitments        
Equity interest 65.00%