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Provisions (Details) - CAD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Provisions [Line Items] |  |
Beginning of year | $ 1,136,374,000 |
Changes in estimates and discont rates [Abstract] |  |
Capitalized in property, plant and equipment | (116,395,000) |
Recognized in earnings | 24,508,000 |
Acquisitions | 2,528,000 |
Provisions used during the period | (28,492,000) |
Unwinding of discount | 28,979,000 |
Effect of movements in exchange rates | 23,528,000 |
End of period | 1,071,030,000 |
Current | 48,305,000 | $ 46,365,000
Non-current | 1,022,725,000 | 1,090,009,000
Outstanding letters of credit facility | 1,593,379,000 | 1,573,873,000
Reclamation [Member] |  |
Provisions [Line Items] |  |
Beginning of year | 1,126,969,000 |
Changes in estimates and discont rates [Abstract] |  |
Capitalized in property, plant and equipment | (116,395,000) |
Recognized in earnings | 22,944,000 |
Acquisitions | 2,528,000 |
Provisions used during the period | (27,159,000) |
Unwinding of discount | 28,681,000 |
Effect of movements in exchange rates | 23,528,000 |
End of period | 1,061,096,000 |
Current | 46,004,000 |
Non-current | 1,015,092,000 |
Estimated total future decommissioning and reclamation costs | $ 1,356,092,000 | 1,100,378,000
Description of period, majority of expenditures will occur after | 2028 |
Outstanding letters of credit facility | $ 1,035,348,000 | 1,007,009,000
Changes In Other Provisions | 90,923,000 |
Reclamation [Member] | Uranium [member] |  |
Provisions [Line Items] |  |
Beginning of year | 900,482,000 |
Changes in estimates and discont rates [Abstract] |  |
End of period | 870,877,000 |
Reclamation [Member] | Fuel Services [Member] |  |
Provisions [Line Items] |  |
Beginning of year | 226,487,000 |
Changes in estimates and discont rates [Abstract] |  |
End of period | 190,219,000 |
Waste Disposal [Member] |  |
Provisions [Line Items] |  |
Beginning of year | 9,405,000 |
Changes in estimates and discont rates [Abstract] |  |
Capitalized in property, plant and equipment | 0 |
Recognized in earnings | 1,564,000 |
Acquisitions | 0 |
Provisions used during the period | (1,333,000) |
Unwinding of discount | 298,000 |
Effect of movements in exchange rates | 0 |
End of period | 9,934,000 |
Current | 2,301,000 |
Non-current | 7,633,000 |
Waste Disposal [Member] | Fuel Services [Member] |  |
Changes in estimates and discont rates [Abstract] |  |
Estimated total future decommissioning and reclamation costs | $ 8,919,000 | $ 8,169,000

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