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Inventories | 12 Months Ended
--- | ---
Dec. 31, 2018
Classes Of Inventories [Abstract] |
Inventories | 7. Inventories
|  | 2018 | 2017
Uranium |  |  |  |
| Concentrate | $ | 255,373 | $ | 820,426
| Broken ore |  | 51,545 |  | 47,083
|  |  | 306,918 |  | 867,509
NUKEM |  | 85,654 |  | 13,801
Fuel services |  | 75,223 |  | 68,456
Total | $ | 467,795 | $ | 949,766
Cameco expensed $1,501,000,000 of inventory as cost of sales during 2018 (2017 - $1,601,000,000). Included in cost of sa les is a $29,296,000 net write-down to reflect ne t realizable value (2017 - $8,662,000 net write-down).

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- Definition The entire disclosure for inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2018-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=2&date=2018-03-01&anchor=sect_Disclosure&doctype=Standard -URIDate 2018-03-16 + Details
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