XML 105 R71.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Transactions - Additional Information (Detail) $ in Millions, $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 30, 2018 | Dec. 31, 2018 CAD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 CAD ($)
Disclosure of significant transactions [line items] |  |  |  |
Assets held for sale |  |  |  | $ 350
Quebrada Blanca SA [member] | ENAMI [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Proportion of ownership interest held by non-controlling interest |  | 10.00% | 10.00% |
Quebrada Blanca SA [member] | Inversiones Mineras S A [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Cash paid |  | $ 67 |  |
Total fair value |  | 175 |  |
Total fair value |  | 16 |  |
Decrease in equity |  | $ 159 |  |
Inversiones Mineras S A [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Proportion of additional interest in subsidiary | 13.50% |  |  |
Compania Mineras Teck Quebrada Blanca SA [member] | Bottom of range [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Proportion of ownership interest in subsidiary | 76.50% |  |  |
Compania Mineras Teck Quebrada Blanca SA [member] | Top of range [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Proportion of ownership interest in subsidiary | 90.00% |  |  |
QB2 project [member] | Quebrada Blanca SA [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Subsequent proportion of ownership interest in subsidiary |  | 60.00% | 60.00% |
QB2 project [member] | Quebrada Blanca SA [member] | Sumitomo [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Subscription for interest |  | 30.00% | 30.00% |
Subsequent proportion of ownership interest held by noncontrolling interest |  | 30.00% | 30.00% |
QB2 project [member] | Inversiones Mineras S A [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Cash paid |  |  | $ 53 |
QB2 project [member] | Inversiones Mineras S A [member] | Social and environmental impact assessment [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Cash paid |  |  | 60 |
QB2 project [member] | Inversiones Mineras S A [member] | Commencement of commercial production [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Cash payable |  |  | $ 50 |
Cash payable period |  | 30 days | 30 days |
Additional amounts may payable to extent average copper prices exceed per pound in each first three years |  | 3.15 | 3.15 |
Cumulative maximum amount if occurs prior to Jan 21, 2024 |  |  | $ 100 |
Waneta Dam [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Percentage of sales interest in asset |  | 66.67% | 66.67% |
Assets held for sale |  |  |  | $ 350
Term power agreement period |  | 20 years | 20 years |
Additional term power arrangement period |  | 10 years | 10 years |
Proceeds from sale of asset |  | $ 1,203,000 |  |
Waneta Dam [member] | Pretax [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
Gain on disposal net of transaction costs |  | 888 |  |
Waneta Dam [member] | After tax [member] |  |  |  |
Disclosure of significant transactions [line items] |  |  |  |
After tax gain on disposal net of transaction costs |  | $ 812 |  |

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