DEBT - Long Term Debt Repayments (Details) $ in Millions, $ in Millions	1 Months Ended
	Mar. 31, 2019 USD ($)	Feb. 28, 2019 USD ($)	Feb. 28, 2019 CAD ($)	Jan. 31, 2019 CAD ($)
Enbridge Energy Partners, L.P. | 8.05% Fixed To Floating Rate Junior Subordinated Notes Due 2067
DEBT
Extinguishment of debt		$ 400
Interest rate (as a percent)		8.05%	8.05%
Enbridge Energy Partners, L.P. | 9.88% Senior Notes
DEBT
Extinguishment of debt	$ 500
Interest rate (as a percent)	9.88%
Westcoast Energy Inc | 5.60% Medium-Term Notes
DEBT
Extinguishment of debt				$ 250
Interest rate (as a percent)				5.60%
Westcoast Energy Inc | 5.60% Medium-term Notes
DEBT
Extinguishment of debt				$ 50
Enbridge Inc. | 4.10% Medium-Term Notes Due February 2019
DEBT
Extinguishment of debt			$ 300
Interest rate (as a percent)		4.10%	4.10%