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SUBSEQUENT EVENT (Details) - CAD ($)
$ in Millions
Apr. 01, 2024
Mar. 31, 2024
Gas Transmission | Subsequent event    
Subsequent Event [Line Items]    
Goodwill allocated to disposal group $ 1,000  
Alliance Pipeline And Aux Sable | Subsequent event    
Subsequent Event [Line Items]    
Gain on sale 1,100  
Alliance Pipeline And Aux Sable | Pembina Pipeline Corporation | Subsequent event    
Subsequent Event [Line Items]    
Consideration upon disposal 3,100  
Non-recourse debt $ 327  
Alliance Pipeline Canada And Us | Alliance Pipeline And Aux Sable    
Subsequent Event [Line Items]    
Ownership interest (in percent)   50.00%
Aux Sable Midstream LLC and Aux Sable Liquid Products LP | Alliance Pipeline And Aux Sable    
Subsequent Event [Line Items]    
Ownership interest (in percent)   42.70%
Aux Sable Canada LP | Alliance Pipeline And Aux Sable    
Subsequent Event [Line Items]    
Ownership interest (in percent)   50.00%