v3.26.1
Business segments (Detail) - CAD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]      
NumberOfReportableSegmentsNotDisclosedFlag    
Revenues and other income      
Revenues [1] $ 12,416 $ 12,466  
Investment and other income 30 51  
Total revenues and other income 12,446 12,517  
Expenses      
Exploration 3 2  
Purchases of crude oil and products [2] 8,178 7,756  
Production and manufacturing [3] 1,754 1,686  
Selling and general [3] 397 259  
Federal excise tax and fuel charge 348 592  
Depreciation and depletion 520 531  
Non-service pension and postretirement benefit 3 5  
Financing (note 5) [4] 11 (2)  
Total expenses 11,214 10,829  
Income (loss) before income taxes 1,232 1,688  
Income taxes 292 400  
Net income (loss) 940 1,288  
Cash flows from (used in) operating activities 756 1,527  
Capital and exploration expenditures 478 398  
Assets 45,453 43,889 $ 42,309
Corporate and other      
Revenues and other income      
Revenues 0 0  
Investment and other income 10 16  
Total revenues and other income 10 16  
Expenses      
Exploration 0 0  
Purchases of crude oil and products 0 0  
Production and manufacturing 3 2  
Selling and general 197 65  
Federal excise tax and fuel charge 0 0  
Depreciation and depletion 13 12  
Non-service pension and postretirement benefit 3 5  
Financing (note 5) 11 10  
Total expenses 227 94  
Income (loss) before income taxes (217) (78)  
Income taxes (52) (20)  
Net income (loss) (165) (58)  
Cash flows from (used in) operating activities 6 (74)  
Capital and exploration expenditures 22 41  
Assets 3,459 3,830  
Eliminations      
Revenues and other income      
Revenues (5,831) (6,348)  
Total revenues and other income (5,831) (6,348)  
Expenses      
Exploration 0 0  
Purchases of crude oil and products (5,829) (6,346)  
Production and manufacturing 0 0  
Selling and general (2) (2)  
Federal excise tax and fuel charge 0 0  
Depreciation and depletion 0 0  
Non-service pension and postretirement benefit 0 0  
Financing (note 5) 0 0  
Total expenses (5,831) (6,348)  
Income (loss) before income taxes 0 0  
Income taxes 0 0  
Net income (loss) 0 0  
Cash flows from (used in) operating activities 0 (15)  
Capital and exploration expenditures 0 0  
Assets (2,572) (2,123)  
Upstream | Intersegment Eliminations      
Revenues and other income      
Revenues 3,895 4,405  
Upstream | Operating Segments      
Revenues and other income      
Revenues 125 39  
Investment and other income 1 14  
Total revenues and other income 4,021 4,458  
Expenses      
Exploration 3 2  
Purchases of crude oil and products 1,719 1,862  
Production and manufacturing 1,236 1,176  
Selling and general 0 0  
Federal excise tax and fuel charge 0 0  
Depreciation and depletion 447 470  
Non-service pension and postretirement benefit 0 0  
Financing (note 5) 0 (12)  
Total expenses 3,405 3,498  
Income (loss) before income taxes 616 960  
Income taxes 146 229  
Net income (loss) 470 731  
Cash flows from (used in) operating activities 121 201  
Capital and exploration expenditures 362 266  
Assets 29,935 29,382  
Downstream | Intersegment Eliminations      
Revenues and other income      
Revenues 1,840 1,837  
Downstream | Operating Segments      
Revenues and other income      
Revenues 12,051 12,161  
Investment and other income 19 21  
Total revenues and other income 13,910 14,019  
Expenses      
Exploration 0 0  
Purchases of crude oil and products 12,062 11,987  
Production and manufacturing 463 457  
Selling and general 180 174  
Federal excise tax and fuel charge 347 591  
Depreciation and depletion 56 45  
Non-service pension and postretirement benefit 0 0  
Financing (note 5) 0 0  
Total expenses 13,108 13,254  
Income (loss) before income taxes 802 765  
Income taxes 191 181  
Net income (loss) 611 584  
Cash flows from (used in) operating activities 604 1,356  
Capital and exploration expenditures 91 88  
Assets 14,104 12,327  
Chemical | Intersegment Eliminations      
Revenues and other income      
Revenues 96 106  
Chemical | Operating Segments      
Revenues and other income      
Revenues 240 266  
Investment and other income 0 0  
Total revenues and other income 336 372  
Expenses      
Exploration 0 0  
Purchases of crude oil and products 226 253  
Production and manufacturing 52 51  
Selling and general 22 22  
Federal excise tax and fuel charge 1 1  
Depreciation and depletion 4 4  
Non-service pension and postretirement benefit 0 0  
Financing (note 5) 0 0  
Total expenses 305 331  
Income (loss) before income taxes 31 41  
Income taxes 7 10  
Net income (loss) 24 31  
Cash flows from (used in) operating activities 25 59  
Capital and exploration expenditures 3 3  
Assets $ 527 $ 473  
[1]
(a) Amounts from related parties included in revenues (note 1)3,660 3,653 
[2]
(b) Amounts to related parties included in purchases of crude oil and products (note 1)1,250 1,206 
[3]
(c) Amounts to related parties included in production and manufacturing, and selling
and general expenses.
155 164 
[4]
(d) Amounts to related parties included in financing.21 26