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DEBT - Narrative (Details) - CAD ($)
$ in Millions
 1 Months Ended 9 Months Ended
Jul. 31, 2025
Sep. 30, 2025
Dec. 31, 2024
Line of Credit Facility [Line Items]      
Increase (decrease) from cumulative fair value adjustments   $ (440) $ (468)
Commercial Paper and Credit Facility Draws      
Line of Credit Facility [Line Items]      
Long term debt current   11,700 10,300
Fixed To Floating Subordinated Term Notes | Subordinated Term Notes      
Line of Credit Facility [Line Items]      
Subordinated debt   16,100 15,500
Revolving Credit Facility | 364-Day Extendible Credit Facility      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity $ 8,800    
Term of credit facility 364 days    
Maturity Jul. 31, 2027    
Term out option period (in years) 1 year    
Revolving Credit Facility | Five-Year Credit Facilities      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity $ 7,800    
Term of credit facility 5 years    
Maturity Jul. 31, 2030    
Revolving Credit Facility | Three-Year Credit Facilities      
Line of Credit Facility [Line Items]      
Term of credit facility 3 years    
Maturity Jul. 31, 2028    
Committed Credit Facilities      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity   $ 23,000  
Term out option period (in years)   1 year  
Unutilized amount of facility   $ 10,023  
Uncommitted Demand Credit Facilities      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity   1,600 1,400
Unutilized amount of facility   $ 994 $ 931
Commitment fee (as percent)   0.10%  
Enbridge Gas Inc. | Committed Credit Facilities      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity   $ 2,500  
Maturity   Dec. 31, 2027  
Unutilized amount of facility   $ 1,225  
Enbridge Gas Inc. | Committed Credit Facilities | 364-Day Extendible Credit Facility      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity $ 2,500    
Term of credit facility 364 days    
Maturity Jul. 31, 2027    
Term out option period (in years) 1 year    
Enbridge Pipelines Inc. | Committed Credit Facilities      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity   $ 2,000  
Maturity   Dec. 31, 2027  
Unutilized amount of facility   $ 911  
Enbridge Pipelines Inc. | Committed Credit Facilities | 364-Day Extendible Credit Facility      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity $ 2,000    
Term of credit facility 364 days    
Maturity Jul. 31, 2027    
Term out option period (in years) 1 year    
Minimum | Uncommitted Demand Credit Facilities      
Line of Credit Facility [Line Items]      
Maturity   Dec. 31, 2027  
Maximum | Uncommitted Demand Credit Facilities      
Line of Credit Facility [Line Items]      
Maturity   Dec. 31, 2049