ACQUISITIONS AND DISPOSITIONS - Schedule of Supplemental Pro Forma Consolidated Financial Information (Details) - CAD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024
Questar Gas Company
Business Acquisition [Line Items]
Operating revenues	$ 11,619	$ 23,589
Earnings attributable to common shareholders	1,871	3,402
The East Ohio Gas Company
Business Acquisition [Line Items]
Operating revenues	11,340	22,686
Earnings attributable to common shareholders	$ 1,842	$ 3,318