DEBT - Schedule of Long-term Debt Issuances (Details)	1 Months Ended
	Apr. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Nov. 30, 2019 USD ($)	Oct. 31, 2019 CAD ($)	Aug. 31, 2019 USD ($)	Aug. 31, 2019 CAD ($)	Feb. 28, 2019 CAD ($)	Apr. 30, 2018 CAD ($)	Jan. 31, 2018 USD ($)
Enbridge Gas Distribution Inc. | 2.37% medium-term notes due August 2029
Debt Instrument [Line Items]
Principal Amount						$ 400,000,000
Fixed interest rate (as a percent)					2.37%	2.37%
Enbridge Gas Distribution Inc. | 3.01% medium-term notes due August 2049
Debt Instrument [Line Items]
Principal Amount						$ 300,000,000
Fixed interest rate (as a percent)					3.01%	3.01%
Enbridge Pipelines Inc. | 3.52% medium-term notes due February 2029
Debt Instrument [Line Items]
Principal Amount							$ 600,000,000
Fixed interest rate (as a percent)							3.52%
Enbridge Pipelines Inc. | 4.33% medium-term notes due February 2049
Debt Instrument [Line Items]
Principal Amount							$ 600,000,000
Fixed interest rate (as a percent)							4.33%
Spectra Energy Partners, LP | 3.24% senior notes due August 20294
Debt Instrument [Line Items]
Principal Amount					$ 500,000,000
Fixed interest rate (as a percent)					3.24%	3.24%
Spectra Energy Partners, LP | 3.50% senior notes due January 20285
Debt Instrument [Line Items]
Principal Amount									$ 400,000,000
Fixed interest rate (as a percent)									3.50%
Spectra Energy Partners, LP | 4.15% senior notes due January 20485
Debt Instrument [Line Items]
Principal Amount									$ 400,000,000
Fixed interest rate (as a percent)									4.15%
Enbridge Inc. | 2.99% medium-term notes due October 2029
Debt Instrument [Line Items]
Principal Amount				$ 1,000,000,000
Fixed interest rate (as a percent)				2.99%
Enbridge Inc. | 2.50% senior notes due July 2025
Debt Instrument [Line Items]
Principal Amount			$ 500,000,000
Fixed interest rate (as a percent)			2.50%
Enbridge Inc. | 3.13% senior notes due November 2029
Debt Instrument [Line Items]
Principal Amount			$ 1,000,000,000
Fixed interest rate (as a percent)			3.13%
Enbridge Inc. | 4.00% senior notes due November 2049
Debt Instrument [Line Items]
Principal Amount			$ 500,000,000
Fixed interest rate (as a percent)			4.00%
Enbridge Inc. | Fixed-to-floating rate subordinated notes due March 20781
Debt Instrument [Line Items]
Principal Amount		$ 850,000,000
Term of credit facility		60 years
Callable period		10 years
Term of fixed rate		10 years
Fixed interest rate (as a percent)		6.25%
Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20782
Debt Instrument [Line Items]
Principal Amount								$ 750,000,000
Term of credit facility	60 years
Callable period	10 years
Term of fixed rate	10 years
Fixed interest rate (as a percent)	6.625%							6.625%
Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Principal Amount	$ 600,000,000
Term of credit facility	60 years
Callable period	5 years
Term of fixed rate	5 years
Fixed interest rate (as a percent)	6.375%							6.375%
Debt Instrument, Redemption, Period One | Enbridge Inc. | Fixed-to-floating rate subordinated notes due March 20781
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		3.64%
Debt Instrument, Redemption, Period One | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20782
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	4.32%
Debt Instrument, Redemption, Period One | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	3.59%
Debt Instrument, Redemption, Period One | Minimum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due March 20781
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate		10 years
Debt Instrument, Redemption, Period One | Minimum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20782
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	10 years
Debt Instrument, Redemption, Period One | Minimum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	5 years
Debt Instrument, Redemption, Period One | Maximum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due March 20781
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate		30 years
Debt Instrument, Redemption, Period One | Maximum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20782
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	30 years
Debt Instrument, Redemption, Period One | Maximum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	10 years
Debt Instrument, Redemption, Period Two | Enbridge Inc. | Fixed-to-floating rate subordinated notes due March 20781
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		4.39%
Debt Instrument, Redemption, Period Two | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20782
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	5.07%
Debt Instrument, Redemption, Period Two | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	3.84%
Debt Instrument, Redemption, Period Two | Minimum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due March 20781
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate		30 years
Debt Instrument, Redemption, Period Two | Minimum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20782
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	30 years
Debt Instrument, Redemption, Period Two | Minimum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	10 years
Debt Instrument, Redemption, Period Two | Maximum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due March 20781
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate		60 years
Debt Instrument, Redemption, Period Two | Maximum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20782
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	60 years
Debt Instrument, Redemption, Period Two | Maximum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	25 years
Debt Instrument, Redemption, Period Three | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	4.59%
Debt Instrument, Redemption, Period Three | Minimum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	25 years
Debt Instrument, Redemption, Period Three | Maximum | Enbridge Inc. | Fixed-to-floating rate subordinated notes due April 20783
Debt Instrument [Line Items]
Period when the notes carry a variable interest rate	60 years