RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income (Details) $ in Millions	6 Months Ended
	Jun. 30, 2025 CAD ($)
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Period to hedge exposures to the variability of cash flows for all forecasted transactions (in years)	2 years
Cash flow hedges
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income
Loss from AOCI expected to be reclassified	$ (1)