DEBT - Credit Facilities (Narrative) (Details) $ in Millions						12 Months Ended
	Feb. 10, 2022 CAD ($)	Jan. 19, 2022 CAD ($)	Jul. 23, 2021 CAD ($)	Feb. 25, 2021 CAD ($) loan	Feb. 10, 2021 CAD ($)	Dec. 31, 2021 CAD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Oct. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	May 31, 2021	Mar. 31, 2021	Feb. 28, 2021	Dec. 31, 2020 CAD ($)
Line of Credit Facility [Line Items]
Principal amount						$ 3,200,000,000		$ 3,900
Long-term debt						67,961,000,000									$ 62,819,000,000
Extinguishment of debt						1,100,000,000	$ 914
Term Loan
Line of Credit Facility [Line Items]
Extinguishment of debt				$ 500,000,000
Number of term loans repaid | loan				2
Commercial paper and credit facility draws
Line of Credit Facility [Line Items]
Long-term debt						11,300,000,000									9,900,000,000
Enbridge Gas Inc. | 2.35% medium-term notes due September 2031
Line of Credit Facility [Line Items]
Principal amount						475,000,000
Interest rate (percent)										2.35%
Enbridge Gas Inc. | 3.20% medium-term notes due September 2051
Line of Credit Facility [Line Items]
Principal amount						425,000,000
Interest rate (percent)										3.20%
Enbridge Gas Inc. | 2.76% medium-term notes
Line of Credit Facility [Line Items]
Interest rate (percent)												276.00%
Extinguishment of debt						$ 200,000,000
Enbridge Gas Inc. | 4.77% medium-term notes
Line of Credit Facility [Line Items]
Interest rate (percent)						477.00%		477.00%
Extinguishment of debt						$ 175,000,000
Enbridge Pipelines Inc.
Line of Credit Facility [Line Items]
Credit facility capacity						3,000,000,000
Unutilized credit facility						2,333,000,000
Enbridge Pipelines Inc. | 2.82% medium-term notes due May 2031
Line of Credit Facility [Line Items]
Principal amount						400,000,000
Interest rate (percent)												2.82%
Enbridge Pipelines Inc. | 4.20% medium-term notes due May 2051
Line of Credit Facility [Line Items]
Principal amount						$ 400,000,000
Interest rate (percent)												4.20%
Spectra Energy Partners, LP | 2.50% senior notes due September 2031
Line of Credit Facility [Line Items]
Principal amount								$ 400
Interest rate (percent)										2.50%
Spectra Energy Partners, LP | 4.60% senior notes
Line of Credit Facility [Line Items]
Extinguishment of debt							250
Enbridge Energy Partners, L.P. | 4.20% senior notes
Line of Credit Facility [Line Items]
Interest rate (percent)											420.00%
Extinguishment of debt							600
Enbridge Pipelines (Southern Lights) L.L.C. | 3.98% senior notes
Line of Credit Facility [Line Items]
Interest rate (percent)						398.00%		398.00%			398.00%
Extinguishment of debt							$ 64
Enbridge Southern Lights LP | 4.01% senior notes
Line of Credit Facility [Line Items]
Interest rate (percent)						401.00%		401.00%			401.00%
Extinguishment of debt						$ 16,000,000
Enbridge Inc.
Line of Credit Facility [Line Items]
Credit facility capacity						9,137,000,000
Unutilized credit facility						1,300,000,000
Enbridge Inc. | 2.50% Sustainability-linked senior notes due August 2033
Line of Credit Facility [Line Items]
Principal amount								$ 1,000
Interest rate (percent)											2.50%
Enbridge Inc. | 3.40% senior notes due August 2051
Line of Credit Facility [Line Items]
Principal amount								500
Interest rate (percent)											3.40%
Enbridge Inc. | 3.10% Sustainability-linked medium-term notes due September 2033
Line of Credit Facility [Line Items]
Principal amount						1,100,000,000
Interest rate (percent)										3.10%
Enbridge Inc. | 4.10% medium-term notes due September 2051
Line of Credit Facility [Line Items]
Principal amount						400,000,000
Interest rate (percent)										4.10%
Enbridge Inc. | 0.55% senior notes due October 2023
Line of Credit Facility [Line Items]
Principal amount								500
Interest rate (percent)									0.55%
Enbridge Inc. | 1.60% senior notes due October 2026
Line of Credit Facility [Line Items]
Principal amount								500
Interest rate (percent)									1.60%
Enbridge Inc. | 3.40% senior notes due August 2051
Line of Credit Facility [Line Items]
Principal amount								$ 500
Interest rate (percent)									3.40%
Enbridge Inc. | 4.26% medium-term notes
Line of Credit Facility [Line Items]
Interest rate (percent)														426.00%
Extinguishment of debt						200,000,000
Enbridge Inc. | 3.16% medium-term notes
Line of Credit Facility [Line Items]
Interest rate (percent)													316.00%
Extinguishment of debt						400,000,000
Spectra Energy Partners, LP | 4.60% senior notes
Line of Credit Facility [Line Items]
Interest rate (percent)													460.00%
Uncommitted credit facilities
Line of Credit Facility [Line Items]
Credit facility capacity						1,300,000,000									849,000,000
Unutilized credit facility						$ 854,000,000									$ 533,000,000
Weighted average standby fee (as a percent)						0.10%	0.10%
Revolving Credit Facility | Sustainability-linked Credit Facility
Line of Credit Facility [Line Items]
Credit facility capacity					$ 1,000,000,000
Term of credit facility					3 years
Revolving Credit Facility | Syndicated Credit Facility
Line of Credit Facility [Line Items]
Term of credit facility					1 year
Extinguishment of debt					$ 3,000,000,000
Revolving Credit Facility | Five-Year Credit Facilities
Line of Credit Facility [Line Items]
Credit facility capacity			$ 8,000,000,000
Term of credit facility			5 years
Revolving Credit Facility | 364-Day Extendible Credit Facilities
Line of Credit Facility [Line Items]
Credit facility capacity			$ 10,000,000,000
Term of credit facility			364 days
Maturity period			1 year
Subsequent Event
Line of Credit Facility [Line Items]
Credit facility capacity	$ 1,000,000,000
Subsequent Event | 10-year Fixed-To-Fixed Subordinated Notes | Subordinated Debt
Line of Credit Facility [Line Items]
Term of credit facility		10 years
Principal amount		$ 750,000,000
Subsequent Event | Revolving Credit Facility | Sustainability-linked Credit Facility
Line of Credit Facility [Line Items]
Credit facility capacity	$ 1,000,000,000
Term of credit facility	3 years