DEBT - Schedule of Long-Term Debt Repayments (Details) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021 CAD ($)	Dec. 31, 2021 USD ($)	Oct. 31, 2021	Jun. 30, 2021	May 31, 2021	Mar. 31, 2021	Feb. 28, 2021
Debt Instrument [Line Items]
Extinguishment of debt	$ 1,100	$ 914
Enbridge Energy Partners, L.P. | 4.20% senior notes
Debt Instrument [Line Items]
Extinguishment of debt		$ 600
Interest rate (percent)				420.00%
Enbridge Gas Inc. | 2.76% medium-term notes
Debt Instrument [Line Items]
Extinguishment of debt	200
Interest rate (percent)					276.00%
Enbridge Gas Inc. | 4.77% medium-term notes
Debt Instrument [Line Items]
Extinguishment of debt	$ 175
Interest rate (percent)	477.00%	477.00%
Enbridge Pipelines (Southern Lights) L.L.C. | 3.98% senior notes
Debt Instrument [Line Items]
Extinguishment of debt		$ 64
Interest rate (percent)	398.00%	398.00%		398.00%
Enbridge Southern Lights LP | 4.01% senior notes
Debt Instrument [Line Items]
Extinguishment of debt	$ 16
Interest rate (percent)	401.00%	401.00%		401.00%
Spectra Energy Partners, LP | 4.60% senior notes
Debt Instrument [Line Items]
Extinguishment of debt		$ 250
Westcoast Energy Inc. | 3.88% medium-term notes
Debt Instrument [Line Items]
Extinguishment of debt	$ 150
Interest rate (percent)			388.00%
Enbridge Inc. | 4.26% medium-term notes
Debt Instrument [Line Items]
Extinguishment of debt	200
Interest rate (percent)							426.00%
Enbridge Inc. | 3.16% medium-term notes
Debt Instrument [Line Items]
Extinguishment of debt	$ 400
Interest rate (percent)						316.00%
Spectra Energy Partners, LP | 4.60% senior notes
Debt Instrument [Line Items]
Interest rate (percent)						460.00%