v3.26.1
Segmented Information (Goodwill, Property, Plant and Equipment and Total Assets by Segment) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Segment Reporting, Asset Reconciling Item [Line Items]    
Goodwill $ 2,843 $ 2,576
Property, Plant and Equipment 15,929 14,244
Total Assets 22,294 20,390
Operating Segments [Member] | USA Operations [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Goodwill 1,938 1,938
Property, Plant and Equipment 10,592 11,613
Total Assets 13,616 14,393
Operating Segments [Member] | Canadian Operations [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Goodwill 905 638
Property, Plant and Equipment 5,233 2,522
Total Assets 7,107 3,921
Corporate & Other [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Goodwill 0 0
Property, Plant and Equipment 104 109
Total Assets $ 1,571 $ 2,076