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Income Taxes - Provision for Income Taxes (Detail) - CAD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Major Components Of Tax Expense Income [Line Items] |  |  |  |
Current Tax Expense (Recovery) | $ 563 | $ 76 | $ 1,116 | $ 1,403
Deferred Tax Expense (Recovery) | (2) | 568 | (416) | 625
Tax Expense (Recovery) From Continuing Operations | 561 | 644 | 700 | 2,028
BP-Husky Refining LLC |  |  |  |
Major Components Of Tax Expense Income [Line Items] |  |  |  |
Deferred Tax Expense (Recovery) |  |  | (176) |
Canada |  |  |  |
Major Components Of Tax Expense Income [Line Items] |  |  |  |
Current Tax Expense (Recovery) | 484 | 187 | 941 | 1,124
United States |  |  |  |
Major Components Of Tax Expense Income [Line Items] |  |  |  |
Current Tax Expense (Recovery) | 4 | (185) | 4 | 96
Asia Pacific |  |  |  |
Major Components Of Tax Expense Income [Line Items] |  |  |  |
Current Tax Expense (Recovery) | 68 | 64 | 152 | 173
Other International |  |  |  |
Major Components Of Tax Expense Income [Line Items] |  |  |  |
Current Tax Expense (Recovery) | $ 7 | $ 10 | $ 19 | $ 10

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