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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Schedule of Foreign Exchange Derivative Instruments that are Designated and Qualify as Fair Value Hedges (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Realized gain/(loss) on derivative	$ 13	$ 54	$ 145	$ 15
Foreign exchange contracts | Fair value hedges
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Unrealized gain/(loss) on derivative	1	71	(13)	(21)
Unrealized gain on hedged item	(1)	(67)	(2)	33
Realized gain/(loss) on derivative	0	(11)	25	36
Realized loss on hedged item	$ 0	$ 0	$ (23)	$ (79)

X

- Definition

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

+ References

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Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Gain (loss) incurred in hedging activities.

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