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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, 2022 | Dec. 31, 2021
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ 17,316 | $ 12,766
Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 17,971 | 13,277
Intra-segment |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | (655) | (511)
Copper |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,381 | 3,452
Copper | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,381 | 3,452
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 | 3,526 | 3,063
Zinc | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 4,181 | 3,574
Zinc | Intra-segment |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | (655) | (511)
Steelmaking Coal |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 10,409 | 6,251
Steelmaking Coal | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 10,409 | 6,251
Steelmaking Coal | Intra-segment |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Copper | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,925 | 3,066
Copper | Copper | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,925 | 3,066
Copper | Zinc | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Copper | Steelmaking Coal | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Zinc | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,432 | 2,622
Zinc | Copper | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 331 | 286
Zinc | Zinc | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 3,101 | 2,336
Zinc | Steelmaking Coal | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Steelmaking coal | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 10,409 | 6,251
Steelmaking coal | Copper | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Steelmaking coal | Zinc | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Steelmaking coal | Steelmaking Coal | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 10,409 | 6,251
Silver | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 381 | 495
Silver | Copper | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 40 | 41
Silver | Zinc | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 341 | 454
Silver | Steelmaking Coal | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Lead | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 348 | 445
Lead | Copper | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 4 | 6
Lead | Zinc | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 344 | 439
Lead | Steelmaking Coal | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 0 | 0
Other | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 476 | 398
Other | Copper | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 81 | 53
Other | Zinc | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 395 | 345
Other | Steelmaking Coal | Segment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ 0 | $ 0

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