v3.26.1
Segmented information (Business segments) (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure Of Operating Segments [Line Items]    
Revenue $ 3,481,933 $ 3,135,772
Cost of products and services sold 2,218,566 2,072,488
Depreciation and amortization 293,094 280,702
Cost of sales 2,511,660 2,353,190
Gross profit (loss) 970,273 782,582
Administration 311,250 253,150
Exploration 27,630 19,419
Research and development 38,467 36,540
Other operating income (28,333) (37,683)
(Gain) loss on disposal of assets 3,117 1,042
Finance costs 115,175 147,171
Gains (losses) on derivatives (95,017) 183,103
Finance income (23,172) (21,228)
Share of loss (earnings) from equity-accounted investees (216,386) 10,844
Foreign exchange (gains) losses 61,740 (65,517)
Other expense (income) (1,459) (975)
Earnings (loss) before income taxes 777,261 256,716
Income tax expense 187,719 84,874
Net earnings (loss) 589,542 171,842
Capital expenditures for the year 333,025 211,635
Uranium [Member]    
Disclosure Of Operating Segments [Line Items]    
Revenue 2,873,950 2,676,620
Cost of products and services sold 1,824,516 1,757,155
Depreciation and amortization 246,326 238,726
Cost of sales 2,070,842 1,995,881
Gross profit (loss) 803,108 680,739
Administration 0 0
Exploration 27,630 19,419
Research and development 0 0
Other operating income (22,221) (35,090)
(Gain) loss on disposal of assets 2,292 253
Finance costs 0 0
Gains (losses) on derivatives 0 0
Finance income 0 0
Share of loss (earnings) from equity-accounted investees (158,862) (207,583)
Foreign exchange (gains) losses 0 0
Other expense (income) 0 0
Earnings (loss) before income taxes 954,269 903,740
Capital expenditures for the year 268,209 132,827
Fuel Services [Member]    
Disclosure Of Operating Segments [Line Items]    
Revenue 562,421 459,152
Cost of products and services sold 348,800 316,040
Depreciation and amortization 39,813 37,236
Cost of sales 388,613 353,276
Gross profit (loss) 173,808 105,876
Administration 0 0
Exploration 0 0
Research and development 0 0
Other operating income (6,112) (2,593)
(Gain) loss on disposal of assets 825 791
Finance costs 0 0
Gains (losses) on derivatives 0 0
Finance income 0 0
Share of loss (earnings) from equity-accounted investees 0 0
Foreign exchange (gains) losses 0 0
Other expense (income) 0 0
Earnings (loss) before income taxes 179,095 107,678
Capital expenditures for the year 57,370 48,667
WEC [Member]    
Disclosure Of Operating Segments [Line Items]    
Revenue 3,457,633 2,892,467
Cost of products and services sold 2,274,065 2,075,189
Depreciation and amortization 383,235 356,864
Cost of sales 2,657,300 2,432,053
Gross profit (loss) 800,333 460,414
Administration 416,007 402,448
Exploration 0 0
Research and development 0 0
Other operating income 0 0
(Gain) loss on disposal of assets 0 0
Finance costs 213,051 225,188
Gains (losses) on derivatives 0 0
Finance income (2,522) (4,381)
Share of loss (earnings) from equity-accounted investees 0 0
Foreign exchange (gains) losses 0 0
Other expense (income) 120,036 116,697
Earnings (loss) before income taxes 53,761 (279,538)
Capital expenditures for the year 205,535 176,229
Adjustments [Member]    
Disclosure Of Operating Segments [Line Items]    
Revenue (3,457,633) (2,892,467)
Cost of products and services sold (2,274,065) (2,075,189)
Depreciation and amortization (383,235) (356,864)
Cost of sales (2,657,300) (2,432,053)
Gross profit (loss) (800,333) (460,414)
Administration (416,007) (402,448)
Exploration 0 0
Research and development 0 0
Other operating income 0 0
(Gain) loss on disposal of assets 0 0
Finance costs (213,051) (225,188)
Gains (losses) on derivatives 0 0
Finance income 2,522 4,381
Share of loss (earnings) from equity-accounted investees (57,524) 218,427
Foreign exchange (gains) losses 0 0
Other expense (income) (120,036) (116,697)
Earnings (loss) before income taxes 3,763 61,111
Capital expenditures for the year (205,535) (176,229)
Other Segment [Member]    
Disclosure Of Operating Segments [Line Items]    
Revenue 45,562 0
Cost of products and services sold 45,250 (707)
Depreciation and amortization 6,955 4,740
Cost of sales 52,205 4,033
Gross profit (loss) (6,643) (4,033)
Administration 311,250 253,150
Exploration 0 0
Research and development 38,467 36,540
Other operating income 0 0
(Gain) loss on disposal of assets 0 (2)
Finance costs 115,175 147,171
Gains (losses) on derivatives (95,017) 183,103
Finance income (23,172) (21,228)
Share of loss (earnings) from equity-accounted investees 0 0
Foreign exchange (gains) losses 61,740 (65,517)
Other expense (income) (1,459) (975)
Earnings (loss) before income taxes (413,627) (536,275)
Capital expenditures for the year $ 7,446 $ 30,141