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Derivative Instruments and Hedging Activities - Schedule of Notional Contracts by Derivative Type (Details)	9 Months Ended
	Sep. 30, 2025 CAD ($) ozt bbl
Derivatives designated as cash flow hedging instruments: | WTI crude oil price swaps | Long
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	400,000
Derivatives designated as cash flow hedging instruments: | WTI crude oil price swaps | Long | 2025
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	400,000
Derivatives designated as cash flow hedging instruments: | WTI crude oil price swaps | Long | 2026
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	0
Derivatives designated as cash flow hedging instruments: | Sub-octane gasoline price swaps | Short
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	400,000
Derivatives designated as cash flow hedging instruments: | Sub-octane gasoline price swaps | Short | 2025
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	400,000
Derivatives designated as cash flow hedging instruments: | Sub-octane gasoline price swaps | Short | 2026
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	0
Derivatives not designated as cash flow hedging instruments: | NYMEX futures (WTI) | Short
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	500,000
Derivatives not designated as cash flow hedging instruments: | NYMEX futures (WTI) | Short | 2025
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	500,000
Derivatives not designated as cash flow hedging instruments: | NYMEX futures (WTI) | Short | 2026
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	0
Derivatives not designated as cash flow hedging instruments: | Forward gasoline and diesel contracts | Long
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	129,200
Derivatives not designated as cash flow hedging instruments: | Forward gasoline and diesel contracts | Long | 2025
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	129,200
Derivatives not designated as cash flow hedging instruments: | Forward gasoline and diesel contracts | Long | 2026
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	0
Derivatives not designated as cash flow hedging instruments: | Forward crude oil contracts | Long
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	180,000
Derivatives not designated as cash flow hedging instruments: | Forward crude oil contracts | Long | 2025
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	0
Derivatives not designated as cash flow hedging instruments: | Forward crude oil contracts | Long | 2026
Economic hedges by derivative type [Line Items]
Derivative notional amount (in barrels)	180,000
Derivatives not designated as cash flow hedging instruments: | Foreign currency forward contracts
Economic hedges by derivative type [Line Items]
Derivative notional amount | $	$ 522,000,000
Derivatives not designated as cash flow hedging instruments: | Foreign currency forward contracts | 2025
Economic hedges by derivative type [Line Items]
Derivative notional amount | $	140,705,100
Derivatives not designated as cash flow hedging instruments: | Foreign currency forward contracts | 2026
Economic hedges by derivative type [Line Items]
Derivative notional amount | $	$ 381,294,900
Derivatives not designated as cash flow hedging instruments: | Forward commodity contracts (platinum)
Economic hedges by derivative type [Line Items]
Derivative notional amount (in troy ounces) | ozt	31,733
Derivatives not designated as cash flow hedging instruments: | Forward commodity contracts (platinum) | 2025
Economic hedges by derivative type [Line Items]
Derivative notional amount (in troy ounces) | ozt	4,592
Derivatives not designated as cash flow hedging instruments: | Forward commodity contracts (platinum) | 2026
Economic hedges by derivative type [Line Items]
Derivative notional amount (in troy ounces) | ozt	27,141

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Nominal volume used to calculate payments on a derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
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-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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