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Revenue - Summary of Revenue Disaggregated by Major Product Type and by Business Unit (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ 15,011 | $ 17,316
Intra-segment |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | (543) | (655)
Copper |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,425 | 3,381
Copper | Intra-segment |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Zinc |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,051 | 3,526
Zinc | Intra-segment |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | (543) | (655)
Steelmaking Coal |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 8,535 | 10,409
Steelmaking Coal | Intra-segment |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Copper | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,016 | 2,925
Copper | Copper | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,016 | 2,925
Copper | Zinc | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Copper | Steelmaking Coal | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Zinc | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,700 | 3,432
Zinc | Copper | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 257 | 331
Zinc | Zinc | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,443 | 3,101
Zinc | Steelmaking Coal | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Steelmaking coal | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 8,535 | 10,409
Steelmaking coal | Copper | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Steelmaking coal | Zinc | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Steelmaking coal | Steelmaking Coal | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 8,535 | 10,409
Silver | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 458 | 381
Silver | Copper | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 44 | 40
Silver | Zinc | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 414 | 341
Silver | Steelmaking Coal | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Lead | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 388 | 348
Lead | Copper | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2 | 4
Lead | Zinc | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 386 | 344
Lead | Steelmaking Coal | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Other | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 457 | 476
Other | Copper | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 106 | 81
Other | Zinc | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 351 | 395
Other | Steelmaking Coal | Operating segments |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ 0 | $ 0

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