VARIABLE INTEREST ENTITIES - Schedule of the Carrying Amount of Interest in VIEs (Details) - CAD ($) $ in Millions		12 Months Ended
	Mar. 18, 2018	Dec. 31, 2021	Dec. 31, 2020
VARIABLE INTEREST ENTITY
Affiliate loan receivable		$ 954	$ 1,108
EIH S.a.r.l.
VARIABLE INTEREST ENTITY
Ownership interest in subsidiary (as a percent)	49.00%	49.00%
Variable Interest Entity, Not Primary Beneficiary
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		$ 1,054	1,351
Maximum Exposure to Loss		4,288	5,424
Variable Interest Entity, Not Primary Beneficiary | Aux Sable Liquid Products L.P.
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		113	106
Maximum Exposure to Loss		195	187
Variable Interest Entity, Not Primary Beneficiary | Eolien Maritime France SAS
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		38	96
Maximum Exposure to Loss		664	949
Affiliate loan receivable		73	132
Variable Interest Entity, Not Primary Beneficiary | Enbridge Renewable Infrastructure Investments S.a.r.l. (ERII)
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		54	100
Maximum Exposure to Loss		2,121	2,516
Affiliate loan receivable		807	904
Variable Interest Entity, Not Primary Beneficiary | PennEast Pipeline Company, LLC
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE			116
Maximum Exposure to Loss			371
Variable Interest Entity, Not Primary Beneficiary | Rampion Offshore Wind Limited
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		450	599
Maximum Exposure to Loss		508	650
Variable Interest Entity, Not Primary Beneficiary | Vector Pipeline L.P.
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		189	201
Maximum Exposure to Loss		374	390
Affiliate loan receivable		80	84
Credit facility provided		105	105
Variable Interest Entity, Not Primary Beneficiary | Other
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		210	133
Maximum Exposure to Loss		$ 426	$ 361