DEBT - Long Term Debt Issuance (Details) $ in Thousands, $ in Millions	Oct. 04, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 CAD ($)	Jun. 30, 2021 USD ($)	May 31, 2021 CAD ($)	Feb. 28, 2021 USD ($)
Debt Instrument [Line Items]
Principal amount of debt		$ 2,400	$ 3,200,000
Senior Notes | Subsequent event
Debt Instrument [Line Items]
Principal amount of debt	$ 1,500
Floating rate notes due February 2023 | Enbridge Inc.
Debt Instrument [Line Items]
Principal amount of debt						$ 500
2.50% Sustainability-Linked senior notes due August 2033 | Enbridge Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)				2.50%
Principal amount of debt				$ 1,000
3.40% senior notes due August 2051 | Senior Notes | Subsequent event
Debt Instrument [Line Items]
Interest rate (as a percent)	3.40%
Principal amount of debt	$ 500
3.40% senior notes due August 2051 | Enbridge Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)				3.40%
Principal amount of debt				$ 500
3.10% Sustainability-Linked medium-term notes due September 2033 | Enbridge Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)		3.10%	3.10%
Principal amount of debt			$ 1,100,000
4.10% medium-term notes due September 2051 | Enbridge Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)		4.10%	4.10%
Principal amount of debt			$ 400,000
2.35% medium-term notes due September 2031 | Enbridge Gas Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)		2.35%	2.35%
Principal amount of debt			$ 475,000
3.20% medium-term notes due September 2051 | Enbridge Gas Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)		3.20%	3.20%
Principal amount of debt			$ 425,000
2.82% medium-term notes due May 2031 | Enbridge Pipelines Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)					2.82%
Principal amount of debt					$ 400,000
4.20% medium-term notes due May 2051 | Enbridge Pipelines Inc.
Debt Instrument [Line Items]
Interest rate (as a percent)					4.20%
Principal amount of debt					$ 400,000
2.50% senior notes due September 2031 | Spectra Energy Partners, LP
Debt Instrument [Line Items]
Interest rate (as a percent)		2.50%	2.50%
Principal amount of debt		$ 400