DEBT - Long Term Debt Issuance (Details) $ in Millions, $ in Millions	Jun. 30, 2021 USD ($)	Jun. 30, 2021 CAD ($)	May 31, 2021 CAD ($)	Feb. 28, 2021 USD ($)
Debt Instrument [Line Items]
Principal Amount	$ 2,000	$ 800
Floating rate notes due February 2023 | Enbridge Inc.
Debt Instrument [Line Items]
Principal Amount				$ 500
2.50% Sustainability-Linked senior notes due August 2033 | Enbridge Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)	2.50%	2.50%
Principal Amount	$ 1,000
3.40% senior notes due August 2051 | Enbridge Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)	3.40%	3.40%
Principal Amount	$ 500
4.20% medium-term notes due May 2051 | Enbridge Pipelines Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)			4.20%
Principal Amount			$ 400
2.82% medium-term notes due May 2031 | Enbridge Pipelines Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)			2.82%
Principal Amount			$ 400