Non-Controlling Interests - Summary of Information About Subsidiaries with Non-controlling Interests and Non-controlling Interest Balances (Details) - CAD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Disclosure of subsidiaries [line items]
Non-controlling interests	$ 1,019	$ 1,304
Quebrada Blanca
Disclosure of subsidiaries [line items]
Percentage of ownership interests held by non-controlling interests	40.00%
Percentage of voting rights held by non-controlling interest	40.00%
Non-controlling interests	$ 889	1,104
Carmen de Andacollo
Disclosure of subsidiaries [line items]
Percentage of ownership interests held by non-controlling interests	10.00%
Percentage of voting rights held by non-controlling interest	10.00%
Non-controlling interests	$ 30	18
Elkview Mine Limited Partnership
Disclosure of subsidiaries [line items]
Percentage of ownership interests held by non-controlling interests	5.00%
Percentage of voting rights held by non-controlling interest	5.00%
Non-controlling interests	$ 0	126
Compania Minera Zafranal S.A.C.
Disclosure of subsidiaries [line items]
Percentage of ownership interests held by non-controlling interests	20.00%
Percentage of voting rights held by non-controlling interest	20.00%
Non-controlling interests	$ 100	$ 56

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The amount of equity in a subsidiary not attributable, directly or indirectly, to a parent. [Refer: Total for all subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The proportion of ownership interests in a subsidiary held by non-controlling interests. [Refer: Total for all subsidiaries [member]; Non-controlling interests]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The proportion of the voting rights in a subsidiary held by non-controlling interests. [Refer: Total for all subsidiaries [member]; Non-controlling interests]

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