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Commitments, Contingencies And Guarantees (Details) - CAD CAD in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Commitments, Contingencies and guarantees |  |
Product transportation and storage | CAD 14,568 |
Energy services | 1,200 |
Exploration work commitments | 497 |
Other | 1,369 |
Operating leases | 2,207 |
Total | 19,841 |
Operating lease expense | 400 | CAD 699
Pipeline commitments | CAD 8,200 |
Pipeline commitment contract term | 20 years |
2018 |  |
Commitments, Contingencies and guarantees |  |
Product transportation and storage | CAD 1,108 |
Energy services | 199 |
Other | 356 |
Operating leases | 439 |
Total | 2,102 |
2019 |  |
Commitments, Contingencies and guarantees |  |
Product transportation and storage | 976 |
Energy services | 160 |
Exploration work commitments | 115 |
Other | 191 |
Operating leases | 330 |
Total | 1,772 |
2020 |  |
Commitments, Contingencies and guarantees |  |
Product transportation and storage | 983 |
Energy services | 204 |
Exploration work commitments | 138 |
Other | 190 |
Operating leases | 291 |
Total | 1,806 |
2021 |  |
Commitments, Contingencies and guarantees |  |
Product transportation and storage | 993 |
Energy services | 141 |
Exploration work commitments | 157 |
Other | 143 |
Operating leases | 252 |
Total | 1,686 |
2022 |  |
Commitments, Contingencies and guarantees |  |
Product transportation and storage | 905 |
Energy services | 143 |
Exploration work commitments | 87 |
Other | 83 |
Operating leases | 208 |
Total | 1,426 |
Thereafter |  |
Commitments, Contingencies and guarantees |  |
Product transportation and storage | 9,603 |
Energy services | 353 |
Other | 406 |
Operating leases | 687 |
Total | CAD 11,049 |

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- Definition The amount of future minimum lease payments payable under non-cancellable operating leases. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Paragraph 35 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_35_a&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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- Definition The portion of operating lease payments that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with any amounts guaranteed by the lessee or by a party related to the lessee recognised as an expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Paragraph 35 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_35_c&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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- Definition The amount of commitments for which the entity has entered into a contract. + References No definition available. + Details
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- Definition The amount of energy services commitments. + References No definition available. + Details
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- Definition The amount of pipeline commitments. + References No definition available. + Details
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