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DEBT - Schedule of Long-term Debt Issuances (Details)	1 Months Ended
	Jul. 31, 2020 USD ($)	Feb. 29, 2020 USD ($)	Dec. 31, 2020 CAD ($)	Dec. 31, 2020 USD ($)	Oct. 31, 2020 USD ($)	May 31, 2020 CAD ($)	Apr. 30, 2020 CAD ($)	Aug. 31, 2019
Debt Instrument [Line Items]
Principal amount			$ 2,500,000,000	$ 2,100,000,000
Enbridge Gas Inc. | 2.90% medium-term notes due April 2030
Debt Instrument [Line Items]
Fixed interest rate (as a percent)							2.90%
Principal amount							$ 600,000,000
Enbridge Gas Inc. | 3.65% medium-term notes due April 2050
Debt Instrument [Line Items]
Fixed interest rate (as a percent)							3.65%
Principal amount							$ 600,000,000
Spectra Energy Partners, LP | 3.10% senior notes due October 2040
Debt Instrument [Line Items]
Fixed interest rate (as a percent)								3.10%
Principal amount					$ 300,000,000
Enbridge Inc. | Floating rate notes due February 2022
Debt Instrument [Line Items]
Principal amount		$ 750,000,000
Enbridge Inc. | Floating rate notes due February 2022 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.50%
Enbridge Inc. | 3.20% medium-term notes due June 2027
Debt Instrument [Line Items]
Fixed interest rate (as a percent)						3.20%
Principal amount						$ 750,000,000
Enbridge Inc. | 2.44% medium-term notes due June 2025
Debt Instrument [Line Items]
Fixed interest rate (as a percent)						2.44%
Principal amount						$ 550,000,000
Enbridge Inc. | Fixed-to-fixed subordinated term notes due July 2080
Debt Instrument [Line Items]
Fixed interest rate (as a percent)	5.75%
Principal amount	$ 1,000,000,000
Term of debt instrument	60 years
Term of fixed rate	10 years
Enbridge Inc. | Fixed-to-fixed subordinated term notes due July 2080 | US Treasury Rate | From years 10 to 30
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	5.31%
Enbridge Inc. | Fixed-to-fixed subordinated term notes due July 2080 | US Treasury Rate | From years 30 to 60
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	6.06%

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

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-Topic 835
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-Section 55
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Contractual interest rate for funds borrowed, under the debt agreement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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