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Inventories
12 Months Ended
Dec. 31, 2020
Classes Of Inventories [Abstract]  
Inventories

7. Inventories

20202019
Uranium
Concentrate$579,653$204,123
Broken ore45,38751,094
625,040255,217
Fuel services52,27362,701
Other3,0562,852
Total$680,369$320,770

Cameco expensed $1,435,000,000 of inventory as cost of sales during 2020 (2019 - $1,398,000,000).