DEBT - Schedule of Interest Expense (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
DEBT
Capitalized interest	$ (101)	$ (74)	$ (215)
Total interest expense	3,812	3,179	2,655
Spectra Energy Capital, LLC
DEBT
Amortization of fair value adjustment	(45)	(45)	(50)
Debentures and term notes
DEBT
Interest expense on debt	3,439	2,910	2,806
Commercial paper and credit facility draws
DEBT
Interest expense on debt	$ 519	$ 388	$ 114