- Additional Information (Detail)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Analysis of income and expense [abstract]
Percentage of foreign operations utilizing U.S. dollar	23.00%	24.00%

Risk Exposure Associated With Instruments Sharing Characteristic Concentration Percentage

No definition available.

Name:	teck_RiskExposureAssociatedWithInstrumentsSharingCharacteristicConcentrationPercentageOfExpensesForeignOperationsWithUSFunctionalCurrency
Namespace Prefix:	teck_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration