XML 43 R12.htm IDEA: XBRL DOCUMENT
v3.23.1

Inventory | 12 Months Ended
--- | ---
Dec. 31, 2022
Disclosure of inventories [Abstract] |
Inventory |
6. | INVENTORY
| December 31, 2022 | December 31, 2021
In-process precious metals | $159.4 |  | $116.2 |
Ore in stockpiles | 10.0 |  | 25.4 |
Parts and supplies | 57.2 |  | 61.0 |
Dore, and refined precious metals | 7.6 |  | 7.0 |
| 234.2 |  | 209.6 |
Less: Long-term inventory | — |  | (10.6) |
| $234.2 |  | $199.0 |
Long term inventory consists of long-term stockpiles which are expected to be recovered after one year. The amount of inventories recognized in mining and processing costs for the year ended December 31, 2022, was $400.5 million (December 31, 2021 - $360.4 million). The amount of inventories recognized in amortization costs for the year ended December 31, 2022, was $171.5 million (December 31, 2021 - $170.9 million). The Company assesses the net realizable value of inventory at each reporting period. In the second and third quarters of 2022, given a decrease in the gold price at the period ends and higher costs at the Mulatos operation, the Company recorded a $33.9 million ($22.4 million after tax) cumulative reduction in the carrying value of the in-process precious metals inventory at Mulatos. This was comprised of $27.6 million related to mining and processing costs and $6.3 million related to amortization (December 31, 2021 - $nil).

X
- Definition Disclosure of inventories [Abstract] + References No definition available. + Details
Name: | agi_DisclosureofinventoriesAbstract
Namespace Prefix: | agi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2022-03-24 -Section Disclosure -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2022-en-r&doctype=Standard&dita_xref=IAS02_g36-39__IAS02_g36-39_TI -URIDate 2022-03-24 + Details
Name: | ifrs-full_DisclosureOfInventoriesExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration