DEBT - Long Term Debt Issuance (Details)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 CAD ($)	Jul. 31, 2020 USD ($)	May 31, 2020 CAD ($)	Apr. 30, 2020 CAD ($)	Feb. 29, 2020 USD ($)
Debt Instrument [Line Items]
Principal Amount	$ 1,800,000,000	$ 2,500,000,000
Enbridge Inc. | Floating rate notes
Debt Instrument [Line Items]
Principal Amount						$ 750,000,000
Enbridge Inc. | 3.20% medium-term notes
Debt Instrument [Line Items]
Principal Amount				$ 750,000,000
Interest rate (as a percent)				3.20%
Enbridge Inc. | 2.44% medium-term notes
Debt Instrument [Line Items]
Principal Amount				$ 550,000,000
Interest rate (as a percent)				2.44%
Enbridge Inc. | Fixed-to-fixed subordinated term notes
Debt Instrument [Line Items]
Principal Amount			$ 1,000,000,000
Enbridge Gas Inc. | 2.90% medium-term notes
Debt Instrument [Line Items]
Principal Amount					$ 600,000,000
Interest rate (as a percent)					2.90%
Enbridge Gas Inc. | 3.65% medium-term notes
Debt Instrument [Line Items]
Principal Amount					$ 600,000,000
Interest rate (as a percent)					3.65%