XML 163 R128.htm IDEA: XBRL DOCUMENT
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Commitments - Additional Information (Detail) CAD in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017 CAD | Dec. 31, 2017 USD ($) | Dec. 31, 2016 CAD | Dec. 31, 2016 USD ($)
Disclosure of commitments [Line Items] |  |  |  |  |
Amount expected to be incurred |  | CAD 766 |  |  |
Expected period |  | 1 year | 1 year |  |
Amount on lease rentals |  | CAD 113 |  | CAD 93 |
Royalty expense |  | 453 |  | 312 |
Within one year [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount expected to be incurred |  | 520 |  |  |
Within two to five years [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount expected to be incurred |  | 246 |  |  |
Office premises [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount on lease rentals |  | 13 |  | 10 |
Mining equipment [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount on lease rentals |  | 60 |  | 36 |
Rail facilities [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount on lease rentals |  | 12 |  | 10 |
Road and port facilities [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount on lease rentals |  | 28 |  | 37 |
Quebrada Blanca Phase 2 [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount expected to be incurred |  | 323 |  |  |
Fort Hills [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount expected to be incurred |  | CAD 196 |  |  |
Ownership interest in joint operation |  | 20.89% | 20.89% |  |
Antamina [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Royalty percentage |  | 7.40% | 7.40% |  |
Royalty expense |  | CAD 28 |  | CAD 17 |
Steelmaking Coal Operations [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount expected to be incurred |  | CAD 175 |  |  |
Red Dog Royalty [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Royalty percentage |  | 35.00% | 35.00% |  |
Maximum net proceeds of production royalty |  | 50.00% | 50.00% |  |
Increase in net proceeds of production royalty | 35.00% | 5.00% | 5.00% |  |
Royalty expense | $ |  |  | $ 324 |  | $ 213
Red Dog Road and Port lease [member] | Over next fifteen years [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Minimum annual user fee | $ |  |  | 18 |  |
Red Dog Road and Port lease [member] | Over next seven years [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Minimum annual user fee | $ |  |  | 6 |  |
Red Dog Road and Port lease [member] | Over twenty two years [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Total remaining user fee | $ |  |  | $ 312 |  |
Other Operations [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Amount expected to be incurred |  | CAD 72 |  |  |
Bottom of range [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Capital expenditure commitments expected period |  | 2 years | 2 years |  |
Top of range [member] |  |  |  |  |
Disclosure of commitments [Line Items] |  |  |  |  |
Capital expenditure commitments expected period |  | 5 years | 5 years |  |
Lease term |  |  |  | 20 years | 20 years

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- Definition The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2017-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_17_b_iii&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2017-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_16_b_iii&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_21_a_iv&doctype=Standard -URIDate 2017-03-09 + Details
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