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Leases - Lease Assets (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Oct. 06, 2020
Disclosure Of Information About Lease Assets Explanatory [Line Items] |  |  |
Lease assets, beginning balance | $ 1,645 | $ 1,789 |
Additions | 88 | 148 |
Depreciation | (216) | (254) |
Derecognitions |  | (35) |
Foreign exchange adjustments and other | (9) | (3) |
Lease assets, ending balance | 1,508 | 1,645 |
Lease assets | 1,508 | 1,645 |
Painted Pony Energy Ltd |  |  |
Disclosure Of Information About Lease Assets Explanatory [Line Items] |  |  |
Lease assets |  |  | $ 93
Product transportation and storage |  |  |
Disclosure Of Information About Lease Assets Explanatory [Line Items] |  |  |
Lease assets, beginning balance | 1,038 | 1,166 |
Additions | 48 | 17 |
Depreciation | (110) | (124) |
Derecognitions |  | (20) |
Foreign exchange adjustments and other | (2) | (1) |
Lease assets, ending balance | 974 | 1,038 |
Lease assets | 974 | 1,038 |
Field equipment and power |  |  |
Disclosure Of Information About Lease Assets Explanatory [Line Items] |  |  |
Lease assets, beginning balance | 379 | 317 |
Additions | 36 | 121 |
Depreciation | (57) | (53) |
Derecognitions |  | (5) |
Foreign exchange adjustments and other | (4) | (1) |
Lease assets, ending balance | 354 | 379 |
Lease assets | 354 | 379 |
Offshore vessels and equipment |  |  |
Disclosure Of Information About Lease Assets Explanatory [Line Items] |  |  |
Lease assets, beginning balance | 128 | 182 |
Additions | 0 | 7 |
Depreciation | (27) | (51) |
Derecognitions |  | (10) |
Foreign exchange adjustments and other | (2) | 0 |
Lease assets, ending balance | 99 | 128 |
Lease assets | 99 | 128 |
Office leases and other |  |  |
Disclosure Of Information About Lease Assets Explanatory [Line Items] |  |  |
Lease assets, beginning balance | 100 | 124 |
Additions | 4 | 3 |
Depreciation | (22) | (26) |
Derecognitions |  | 0 |
Foreign exchange adjustments and other | (1) | (1) |
Lease assets, ending balance | 81 | 100 |
Lease assets | $ 81 | $ 100 |

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- Definition Disposals Of Right-Of-Use Assets + References No definition available. + Details
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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2021-01-01 -Paragraph 53 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_h&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2021-01-01 -Paragraph 53 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2021-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_j&doctype=Standard -URIDate 2021-03-24 + Details
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