XML 48 R30.htm IDEA: XBRL DOCUMENT v3.22.4

Amounts Receivable (Tables)

12 Months Ended

Dec. 31, 2022

Subclassifications of assets, liabilities and equities [abstract]

Schedule of Receivables

			December 31, 2022			December 31, 2021
Sales tax receivables
Canada			$15.1			$6.5
Mexico			16.4			18.7
Other			1.1			1.9
Other receivables			4.6			4.0
			$37.2			$31.1

X

- Definition

Schedule of Receivables [Table Text Block]

+ References

No definition available.

+ Details

Name:	agi_ScheduleofReceivablesTableTextBlock
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