v3.26.3
Business segments (Detail) - CAD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
NumberOfReportableSegmentsNotDisclosedFlag        
Revenues and other income          
Revenues [1] $ 16,179 $ 11,994 $ 44,576 $ 35,668  
Investment and other income 26 55 137 130  
Total revenues and other income 16,205 12,049 44,713 35,798  
Expenses          
Exploration 6 1 10 3  
Purchases of crude oil and products [2] 10,130 7,776 28,949 22,747  
Production and manufacturing [3] 1,949 1,625 5,522 4,975  
Selling and general [3] 390 622 931 1,132  
Federal excise tax and fuel charge 0 380 418 1,344  
Depreciation and depletion 500 911 1,531 1,920  
Non-service pension and postretirement benefit (2) 25 3 36  
Financing [4] 13 8 38 8  
Total expenses 12,986 11,348 37,402 32,165  
Income (loss) before income taxes 3,219 701 7,311 3,633  
Income taxes 765 162 1,727 857  
Net income (loss) 2,454 539 5,584 2,776  
Cash flows from (used in) operating activities 3,228 1,798 6,688 4,790  
Capital and exploration expenditures 668 505 1,677 1,376  
Assets 49,291 42,963 49,291 42,963 $ 42,309
Corporate and other          
Revenues and other income          
Revenues 0 0 0 0  
Investment and other income 23 21 45 50  
Total revenues and other income 23 21 45 50  
Expenses          
Exploration 0 0 0 0  
Purchases of crude oil and products 0 0 0 0  
Production and manufacturing 0 7 6 18  
Selling and general 130 433 260 556  
Federal excise tax and fuel charge 0 0 0 0  
Depreciation and depletion 11 417 37 441  
Non-service pension and postretirement benefit (2) 25 3 36  
Financing 8 5 28 17  
Total expenses 147 887 334 1,068  
Income (loss) before income taxes (124) (866) (289) (1,018)  
Income taxes (30) (212) (69) (248)  
Net income (loss) (94) (654) (220) (770)  
Cash flows from (used in) operating activities 176 49 106 (88)  
Capital and exploration expenditures 24 34 65 104  
Assets 5,177 4,034 5,177 4,034  
Corporate and other | Calgary Imperial Campus          
Expenses          
Assets   466   466  
Eliminations          
Revenues and other income          
Revenues (6,870) (5,647) (20,446) (17,343)  
Total revenues and other income (6,870) (5,647) (20,446) (17,343)  
Expenses          
Exploration 0 0 0 0  
Purchases of crude oil and products (6,868) (5,645) (20,439) (17,337)  
Production and manufacturing 0 0 0 0  
Selling and general (2) (2) (7) (6)  
Federal excise tax and fuel charge 0 0 0 0  
Depreciation and depletion 0 0 0 0  
Non-service pension and postretirement benefit 0 0 0 0  
Financing 0 0 0 0  
Total expenses (6,870) (5,647) (20,446) (17,343)  
Income (loss) before income taxes 0 0 0 0  
Income taxes 0 0 0 0  
Net income (loss) 0 0 0 0  
Cash flows from (used in) operating activities 0 0 0 (15)  
Capital and exploration expenditures 0 0 0 0  
Assets (2,518) (1,758) (2,518) (1,758)  
Upstream | Intersegment Eliminations          
Revenues and other income          
Revenues 4,900 4,034 14,182 12,140  
Upstream | Operating Segments          
Revenues and other income          
Revenues 167 72 402 198  
Investment and other income 1 3 3 13  
Total revenues and other income 5,068 4,109 14,587 12,351  
Expenses          
Exploration 6 1 10 3  
Purchases of crude oil and products 2,007 1,612 5,896 4,843  
Production and manufacturing 1,376 1,098 3,832 3,401  
Selling and general 0 0 0 0  
Federal excise tax and fuel charge 0 0 0 0  
Depreciation and depletion 430 434 1,286 1,322  
Non-service pension and postretirement benefit 0 0 0 0  
Financing 5 3 9 (9)  
Total expenses 3,824 3,148 11,033 9,560  
Income (loss) before income taxes 1,244 961 3,554 2,791  
Income taxes 303 233 844 668  
Net income (loss) 941 728 2,710 2,123  
Cash flows from (used in) operating activities 2,069 1,415 3,897 2,637  
Capital and exploration expenditures 514 353 1,235 972  
Assets 29,858 28,449 29,858 28,449  
Downstream | Intersegment Eliminations          
Revenues and other income          
Revenues 1,842 1,517 5,912 4,904  
Downstream | Operating Segments          
Revenues and other income          
Revenues 15,737 11,675 43,340 34,698  
Investment and other income 2 31 89 67  
Total revenues and other income 17,581 13,223 49,341 39,669  
Expenses          
Exploration 0 0 0 0  
Purchases of crude oil and products 14,748 11,578 42,746 34,517  
Production and manufacturing 517 462 1,522 1,385  
Selling and general 229 169 604 518  
Federal excise tax and fuel charge 0 379 417 1,340  
Depreciation and depletion 57 56 192 145  
Non-service pension and postretirement benefit 0 0 0 0  
Financing 0 0 1 0  
Total expenses 15,551 12,644 45,482 37,905  
Income (loss) before income taxes 2,030 579 3,859 1,764  
Income taxes 475 135 906 414  
Net income (loss) 1,555 444 2,953 1,350  
Cash flows from (used in) operating activities 886 319 2,517 2,316  
Capital and exploration expenditures 124 114 340 292  
Assets 16,205 11,696 16,205 11,696  
Chemical | Intersegment Eliminations          
Revenues and other income          
Revenues 128 96 352 299  
Chemical | Operating Segments          
Revenues and other income          
Revenues 275 247 834 772  
Investment and other income 0 0 0 0  
Total revenues and other income 403 343 1,186 1,071  
Expenses          
Exploration 0 0 0 0  
Purchases of crude oil and products 243 231 746 724  
Production and manufacturing 56 58 162 171  
Selling and general 33 22 74 64  
Federal excise tax and fuel charge 0 1 1 4  
Depreciation and depletion 2 4 16 12  
Non-service pension and postretirement benefit 0 0 0 0  
Financing 0 0 0 0  
Total expenses 334 316 999 975  
Income (loss) before income taxes 69 27 187 96  
Income taxes 17 6 46 23  
Net income (loss) 52 21 141 73  
Cash flows from (used in) operating activities 97 15 168 (60)  
Capital and exploration expenditures 6 4 37 8  
Assets $ 569 $ 542 $ 569 $ 542  
[1]
(a) Amounts from related parties included in revenues.4,592 3,345 13,438 10,340 
[2]
(b) Amounts to related parties included in purchases of crude oil and products.2,195 1,619 5,340 4,188 
[3]
(c) Amounts to related parties included in production and manufacturing, and selling
and general expenses.
183 88 502 382 
[4]
(d) Amounts to related parties included in financing.22 30 65 79