DEBT - Schedule of Debt (Details) $ in Millions, $ in Billions	12 Months Ended
	Dec. 31, 2021 CAD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CAD ($)	Dec. 31, 2020 USD ($)
DEBT
Total debt	$ 75,640		$ 66,897
Fair value adjustment	667		750
Other	(363)		(344)
Current maturities	(6,164)		(2,957)
Short-term borrowings	(1,515)		(1,121)
Long-term debt	67,961		62,819
Long-term debt	$ 36,000	$ 31	$ 35,000	$ 24
Weighted average interest rate (as a percent)	0.50%	0.50%	0.30%	0.30%
US dollar senior notes | Enbridge Inc.
DEBT
Weighted average interest rate (percent)	3.20%	3.20%
Total debt	$ 10,992		$ 8,536
Medium-term notes | Enbridge Gas Inc.
DEBT
Weighted average interest rate (percent)	3.80%	3.80%
Total debt	$ 9,010		8,485
Medium-term notes | Enbridge Pipelines Inc.
DEBT
Weighted average interest rate (percent)	4.00%	4.00%
Total debt	$ 5,575		4,775
Carrying value	$ 100
Medium-term notes | Westcoast Energy Inc.
DEBT
Weighted average interest rate (percent)	4.50%	4.50%
Total debt	$ 1,475		1,625
Medium-term notes | Enbridge Inc.
DEBT
Weighted average interest rate (percent)	3.90%	3.90%
Total debt	$ 8,123		8,323
Sustainability-Linked Bonds | Enbridge Inc.
DEBT
Weighted average interest rate (percent)	1.10%	1.10%
Total debt	$ 2,363		0
Fixed-to-fixed subordinated term notes | Enbridge Inc.
DEBT
Weighted average interest rate (percent)	5.80%	5.80%
Total debt	$ 1,263		1,274
Term of fixed rate	10 years
Fixed-to-floating rate subordinated term notes | Enbridge Inc.
DEBT
Weighted average interest rate (percent)	5.80%	5.80%
Total debt	$ 6,442		6,477
Term of fixed rate	10 years
Floating rate notes | Enbridge Inc.
DEBT
Weighted average interest rate (percent)
Total debt	$ 1,579		956
Commercial paper and credit facility draws | Enbridge (U.S.) Inc.
DEBT
Weighted average interest rate (percent)	0.40%	0.40%
Total debt	$ 4,845		492
Commercial paper and credit facility draws | Enbridge Gas Inc.
DEBT
Weighted average interest rate (percent)	0.50%	0.50%
Total debt	$ 1,515		1,121
Commercial paper and credit facility draws | Enbridge Pipelines Inc.
DEBT
Weighted average interest rate (percent)	0.70%	0.70%
Total debt	$ 667		1,278
Commercial paper and credit facility draws | Enbridge Inc.
DEBT
Weighted average interest rate (percent)	1.00%	1.00%
Total debt	$ 7,837		8,719
Other | Enbridge (U.S.) Inc.
DEBT
Total debt	7		7
Other | Enbridge Inc.
DEBT
Total debt	$ 5		5
Senior notes | Enbridge Energy Partners, L.P.
DEBT
Weighted average interest rate (percent)	6.50%	6.50%
Total debt	$ 3,095		3,886
Senior notes | Enbridge Pipelines (Southern Lights) L.L.C.
DEBT
Weighted average interest rate (percent)	4.00%	4.00%
Total debt	$ 949		1,038
Senior notes | Enbridge Southern Lights LP
DEBT
Weighted average interest rate (percent)	4.00%	4.00%
Total debt	$ 240		257
Senior notes | Spectra Energy Capital, LLC
DEBT
Weighted average interest rate (percent)	7.00%	7.00%
Total debt	$ 218		220
Senior notes | Spectra Energy Partners, LP
DEBT
Weighted average interest rate (percent)	3.90%	3.90%
Total debt	$ 8,451		8,332
Debentures | Enbridge Gas Inc.
DEBT
Weighted average interest rate (percent)	9.10%	9.10%
Total debt	$ 210		210
Debentures | Enbridge Pipelines Inc.
DEBT
Weighted average interest rate (percent)	8.20%	8.20%
Total debt	$ 200		200
Debentures | Westcoast Energy Inc.
DEBT
Weighted average interest rate (percent)	8.10%	8.10%
Total debt	$ 275		$ 275
LIBOR | Floating rate notes | Enbridge Inc.
DEBT
Basis spread on variable rate (as a percent)	0.50%
US Treasury Rate | Fixed-to-fixed subordinated term notes | Enbridge Inc. | From years 10 to 30
DEBT
Basis spread on variable rate (as a percent)	5.31%
US Treasury Rate | Fixed-to-fixed subordinated term notes | Enbridge Inc. | From years 30 to 60
DEBT
Basis spread on variable rate (as a percent)	6.06%
SOFR | Floating rate notes | Enbridge Inc.
DEBT
Basis spread on variable rate (as a percent)	0.40%