DEBT - Narrative (Details) $ in Millions		3 Months Ended
	Feb. 10, 2021	Mar. 31, 2022 CAD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 CAD ($)	Mar. 31, 2022 USD ($)	Feb. 10, 2022 CAD ($)	Dec. 31, 2021 CAD ($)
Line of Credit Facility [Line Items]
Commitment fee percentage		0.10%	0.10%
Long-term debt		$ 70,490,000,000					$ 67,961,000,000
Long-term debt, fair value adjustment		646,000,000					667,000,000
Amortization of fair value adjustment		11,000,000		$ 12,000,000
Commercial paper and credit facility draws
Line of Credit Facility [Line Items]
Long-term debt		12,400,000,000					11,300,000,000
5.00% hybrid fixed-to-fixed subordinated notes due January 2082 | Enbridge Inc.
Line of Credit Facility [Line Items]
Principal amount of debt		750,000,000			$ 1,500
Floating rate notes | Enbridge Inc.
Line of Credit Facility [Line Items]
Principal amount		200,000,000	$ 750
Fixed-to-floating subordinated term notes | Subordinated term notes
Line of Credit Facility [Line Items]
Subordinated debt		8,400,000,000
Fixed-to-fixed subordinated term notes | Subordinated term notes
Line of Credit Facility [Line Items]
Subordinated debt							7,700,000,000
Revolving credit facility | Sustainability-linked Credit Facility
Line of Credit Facility [Line Items]
Debt instrument maturity period (in year)	3 years
Amount of credit facility						$ 1,000,000,000
Uncommitted demand credit facilities
Line of Credit Facility [Line Items]
Amount of credit facility		1,300,000,000					1,300,000,000
Unutilized amount of facility		$ 947,000,000					$ 854,000,000