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Right of Use Assets, Net - Summary of Right of Use Assets, Net (Detail) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Feb. 28, 2023
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | $ 1,845 |  |
Balance at end of period | 1,680 | $ 1,845 |
Right-of-Use Assets, Net | 1,680 | 1,845 |
BP-Husky Refining LLC |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-Use Assets, Net |  |  | $ 7
COST |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 2,687 | 2,656 |
Additions | 57 | 25 |
Exchange Rate Movements and Other | 25 | 6 |
Acquisitions (Note 5) (3) | 33 |  |
Divestitures | 19 |  |
Balance at end of period | 2,783 | 2,687 |
Right-of-Use Assets, Net | 2,783 | 2,687 |
ACCUMULATED DEPRECIATION |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 842 | 646 |
Exchange Rate Movements and Other | (20) | (101) |
Divestitures | 12 |  |
Depreciation | 293 | 297 |
Balance at end of period | 1,103 | 842 |
Real Estate |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 472 |  |
Balance at end of period | 432 | 472 |
Right-of-Use Assets, Net | 432 | 472 |
Real Estate | COST |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 599 | 592 |
Additions | 1 | 0 |
Exchange Rate Movements and Other | (13) | 7 |
Acquisitions (Note 5) (3) | 1 |  |
Divestitures | 0 |  |
Balance at end of period | 588 | 599 |
Right-of-Use Assets, Net | 588 | 599 |
Real Estate | ACCUMULATED DEPRECIATION |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 127 | 92 |
Exchange Rate Movements and Other | (7) | (1) |
Divestitures | 0 |  |
Depreciation | 36 | 36 |
Balance at end of period | 156 | 127 |
Transportation And Storage Assets |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 1,195 |  |
Balance at end of period | 1,101 | 1,195 |
Right-of-Use Assets, Net | 1,101 | 1,195 |
Transportation And Storage Assets | COST |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 1,840 | 1,841 |
Additions | 56 | 22 |
Exchange Rate Movements and Other | 44 | (23) |
Acquisitions (Note 5) (3) | 24 |  |
Divestitures | 0 |  |
Balance at end of period | 1,964 | 1,840 |
Right-of-Use Assets, Net | 1,964 | 1,840 |
Transportation And Storage Assets | ACCUMULATED DEPRECIATION |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 645 | 520 |
Exchange Rate Movements and Other | (5) | (101) |
Divestitures | 0 |  |
Depreciation | 223 | 226 |
Balance at end of period | 863 | 645 |
Refining Assets |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 116 |  |
Balance at end of period | 96 | 116 |
Right-of-Use Assets, Net | 96 | 116 |
Refining Assets | COST |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 174 | 161 |
Additions | 0 | 1 |
Exchange Rate Movements and Other | (2) | 12 |
Acquisitions (Note 5) (3) | 8 |  |
Divestitures | 19 |  |
Balance at end of period | 161 | 174 |
Right-of-Use Assets, Net | 161 | 174 |
Refining Assets | ACCUMULATED DEPRECIATION |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 58 | 33 |
Exchange Rate Movements and Other | (3) | 4 |
Divestitures | 12 |  |
Depreciation | 22 | 21 |
Balance at end of period | 65 | 58 |
Other Assets |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 62 |  |
Balance at end of period | 51 | 62 |
Right-of-Use Assets, Net | 51 | 62 |
Other Assets | COST |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 74 | 62 |
Additions | 0 | 2 |
Exchange Rate Movements and Other | (4) | 10 |
Acquisitions (Note 5) (3) | 0 |  |
Divestitures | 0 |  |
Balance at end of period | 70 | 74 |
Right-of-Use Assets, Net | 70 | 74 |
Other Assets | ACCUMULATED DEPRECIATION |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Balance at beginning of period | 12 | 1 |
Exchange Rate Movements and Other | (5) | (3) |
Divestitures | 0 |  |
Depreciation | 12 | 14 |
Balance at end of period | $ 19 | $ 12 |

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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. 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 2023-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_j&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_a&doctype=Standard -URIDate 2023-03-23 + Details
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