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v3.20.4

Segmented Information - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2020 segment
Operating Segments [Abstract] |
Number of reportable segments | 5

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- Definition Number of Reportable Segments1 + References No definition available. + Details
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Namespace Prefix: | teck_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Operating Segments [Abstract] + References No definition available. + Details
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Namespace Prefix: | teck_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration