v3.26.1
Segmented Information (Segment Information) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]        
Revenues $ 2,872 $ 2,214 $ 5,449 $ 4,589
Gains (losses) on risk management, net 122 87 59 71
Sublease revenues 19 17 37 35
Total Revenues 3,013 2,318 5,545 4,695
Production, mineral and other taxes 81 73 160 160
Transportation and processing 540 435 1,011 833
Operating 183 219 410 424
Purchased product 563 440 907 842
Depreciation, depletion and amortization 519 556 1,080 1,101
Impairments 0 0 1,485 730
Accretion of asset retirement obligation 7 8 14 14
Administrative 126 76 238 169
Total Operating Expenses 2,019 1,807 5,305 4,273
Operating Income (Loss) 994 511 240 422
Interest 100 95 204 192
Foreign exchange (gain) loss, net 23 22 21 32
(Gain) loss on divestitures, net 337 0 337 0
Other (gains) losses, net (5) (5) (34) (8)
Total Other (Income) Expenses 455 112 528 216
Net Earnings (Loss) Before Income Tax 539 399 (288) 206
Income tax expense (recovery) 83 92 (114) 58
Net Earnings (Loss) 456 307 (174) 148
Product and Service Revenues [Member]        
Segment Reporting Information [Line Items]        
Revenues 2,297 1,764 4,518 3,729
Sales of Purchased Product [Member]        
Segment Reporting Information [Line Items]        
Revenues 575 450 931 860
Operating Segments [Member] | USA Operations [Member]        
Segment Reporting Information [Line Items]        
Gains (losses) on risk management, net (103) 9 (126) 9
Sublease revenues 0 0 0 0
Total Revenues 1,673 1,523 3,146 3,203
Production, mineral and other taxes 71 67 142 150
Transportation and processing 90 115 205 227
Operating 135 177 311 346
Purchased product 506 395 773 763
Depreciation, depletion and amortization 282 370 618 745
Impairments 0 0 1,111 0
Total Operating Expenses 1,084 1,124 3,160 2,231
Operating Income (Loss) 589 399 (14) 972
Operating Segments [Member] | USA Operations [Member] | Product and Service Revenues [Member]        
Segment Reporting Information [Line Items]        
Revenues 1,270 1,118 2,499 2,430
Operating Segments [Member] | USA Operations [Member] | Sales of Purchased Product [Member]        
Segment Reporting Information [Line Items]        
Revenues 506 396 773 764
Operating Segments [Member] | Canadian Operations [Member]        
Segment Reporting Information [Line Items]        
Gains (losses) on risk management, net 35 24 48 54
Sublease revenues 0 0 0 0
Total Revenues 1,131 724 2,225 1,449
Production, mineral and other taxes 10 6 18 10
Transportation and processing 450 320 806 606
Operating 48 42 99 78
Purchased product 57 45 134 79
Depreciation, depletion and amortization 233 180 453 345
Impairments 0 0 374 730
Total Operating Expenses 798 593 1,884 1,848
Operating Income (Loss) 333 131 341 (399)
Operating Segments [Member] | Canadian Operations [Member] | Product and Service Revenues [Member]        
Segment Reporting Information [Line Items]        
Revenues 1,027 646 2,019 1,299
Operating Segments [Member] | Canadian Operations [Member] | Sales of Purchased Product [Member]        
Segment Reporting Information [Line Items]        
Revenues 69 54 158 96
Corporate & Other [Member]        
Segment Reporting Information [Line Items]        
Revenues 0 0 0 0
Gains (losses) on risk management, net 190 54 137 8
Sublease revenues 19 17 37 35
Total Revenues 209 71 174 43
Production, mineral and other taxes 0 0 0 0
Transportation and processing 0 0 0 0
Operating 0 0 0 0
Purchased product 0 0 0 0
Depreciation, depletion and amortization 4 6 9 11
Impairments 0 0 0 0
Accretion of asset retirement obligation 7 8 14 14
Administrative 126 76 238 169
Total Operating Expenses 137 90 261 194
Operating Income (Loss) 72 (19) (87) (151)
Corporate & Other [Member] | Product and Service Revenues [Member]        
Segment Reporting Information [Line Items]        
Revenues 0 0 0 0
Corporate & Other [Member] | Sales of Purchased Product [Member]        
Segment Reporting Information [Line Items]        
Revenues $ 0 $ 0 $ 0 $ 0