v3.26.1
Segmented Information (Capital Expenditures by Segment) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting, Asset Reconciling Item [Line Items]    
Capital Expenditures $ 605 $ 617
Operating Segments [Member] | USA Operations [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Capital Expenditures 417 458
Operating Segments [Member] | Canadian Operations [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Capital Expenditures 187 158
Corporate & Other [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Capital Expenditures $ 1 $ 1