XML 46 R12.htm IDEA: XBRL DOCUMENT
v3.22.1

Inventory | 12 Months Ended
--- | ---
Dec. 31, 2021
Disclosure of inventories [Abstract] |
Inventory |
6. | INVENTORY
| December 31, 2021 | December 31, 2020
In-process precious metals | $116.2 |  | $72.7 |
Ore in stockpiles | 25.4 |  | 30.8 |
Parts and supplies | 61.0 |  | 53.0 |
Dore, and refined precious metals | 7.0 |  | 9.9 |
| 209.6 |  | 166.4 |
Less: Long-term inventory | (10.6) |  | (17.9) |
| $199.0 |  | $148.5 |
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, 2021, was $360.4 million (December 31, 2020 - $319.9 million). The amount of inventories recognized in amortization costs for the year ended December 31, 2021, was $170.9 million (December 31, 2020 - $152.7 million). During the second quarter of 2020, the Company temporarily suspended operations at Island Gold and Mulatos due to the COVID-19 pandemic. During this period, indirect production costs that exceeded normal operating capacity were expensed as incurred and not including in the inventory valuation. The Company identified indirect production costs of $5.4 million and amortization costs of $1.1 million which were classified as COVID-19 costs in the second quarter of 2020. All operating costs incurred subsequent to the mine-sites returning to planned operating levels were included in mining and processing costs. As a result, there were no amounts classified as COVID-19 costs subsequent to June 30, 2020.

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 2021-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2021-en-r&doctype=Standard&dita_xref=IAS02_g36-39__IAS02_g36-39_TI -URIDate 2021-03-24 + Details
Name: | ifrs-full_DisclosureOfInventoriesExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration