XML 63 R32.htm IDEA: XBRL DOCUMENT
v3.23.1

Other current assets (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Subclassifications of assets, liabilities and equities [abstract] |
Other current assets |
| December 31, 2022 | December 31, 2021
Prepaid assets | $13.1 |  | $10.9 |
Advances on capital projects (i) | 3.1 |  | 9.8 |
Derivative assets (note 17) | — |  | 3.5 |
| $16.2 |  | $24.2 |
(i) Advances on capital projects Capital advances include payments made to contractors and suppliers with respect to the Company's development projects and expansions. The related work to be performed is expected to be completed within one year.

X
- Definition Schedule of Other Current Assets + References No definition available. + Details
Name: | agi_ScheduleOfOtherCurrentAssetsTableTextBlock
Namespace Prefix: | agi_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration