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Commitments and Contingencies - Future Payments for Commitments (Details) - CAD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2023 | Feb. 28, 2023 | Feb. 15, 2023 | Dec. 31, 2022
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Transportation and storage | $ 24,667 |  |  | $ 21,081
Product Purchases | 617 |  |  | 9,358
Real estate | 898 |  |  | 856
Obligation to fund equity-accounted affiliate | 513 |  |  | 623
Other long term committments | 2,101 |  |  | 1,080
Total Commitments | $ 28,796 |  |  | 32,998
Transportation commitments subject to regulatory approval or approved but not yet in service term | 20 years |  |  |
Contractual commitments | $ 28,796 |  |  | 32,998
Outstanding letters of credit | 364 |  |  | 490
Transportation commitment |  |  | $ 587 |
BP-Husky Refining LLC |  |  |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Total Payments |  | $ 538 |  |
HMLP |  |  |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Total Commitments | 2,100 |  |  | 2,200
Contractual commitments | 2,100 |  |  | 2,200
Commitments approved and not yet in service |  |  |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Transportation commitments | 13,000 |  |  | 9,100
1 Year |  |  |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Transportation and storage | 2,018 |  |  | 1,747
Product Purchases | 617 |  |  | 1,626
Real estate | 57 |  |  | 48
Obligation to fund equity-accounted affiliate | 94 |  |  | 92
Other long term committments | 417 |  |  | 381
Total Commitments | 3,203 |  |  | 3,894
Contractual commitments | 3,203 |  |  | 3,894
2 Years |  |  |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Transportation and storage | 1,927 |  |  | 2,011
Product Purchases | 0 |  |  | 1,509
Real estate | 57 |  |  | 50
Obligation to fund equity-accounted affiliate | 94 |  |  | 105
Other long term committments | 194 |  |  | 90
Total Commitments | 2,272 |  |  | 3,765
Contractual commitments | 2,272 |  |  | 3,765
3 Years |  |  |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Transportation and storage | 1,680 |  |  | 1,542
Product Purchases | 0 |  |  | 922
Real estate | 59 |  |  | 50
Obligation to fund equity-accounted affiliate | 94 |  |  | 96
Other long term committments | 184 |  |  | 75
Total Commitments | 2,017 |  |  | 2,685
Contractual commitments | 2,017 |  |  | 2,685
4 Years |  |  |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Transportation and storage | 1,663 |  |  | 1,416
Product Purchases | 0 |  |  | 922
Real estate | 63 |  |  | 50
Obligation to fund equity-accounted affiliate | 89 |  |  | 96
Other long term committments | 175 |  |  | 74
Total Commitments | 1,990 |  |  | 2,558
Contractual commitments | 1,990 |  |  | 2,558
5 Years |  |  |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Transportation and storage | 1,641 |  |  | 1,360
Product Purchases | 0 |  |  | 922
Real estate | 58 |  |  | 54
Obligation to fund equity-accounted affiliate | 52 |  |  | 91
Other long term committments | 166 |  |  | 65
Total Commitments | 1,917 |  |  | 2,492
Contractual commitments | 1,917 |  |  | 2,492
Thereafter |  |  |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |  |  |
Transportation and storage | 15,738 |  |  | 13,005
Product Purchases | 0 |  |  | 3,457
Real estate | 604 |  |  | 604
Obligation to fund equity-accounted affiliate | 90 |  |  | 143
Other long term committments | 965 |  |  | 395
Total Commitments | 17,397 |  |  | 17,604
Contractual commitments | $ 17,397 |  |  | $ 17,604

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