VARIABLE INTEREST ENTITIES - Schedule of the Carrying Amount of Interest in VIEs (Details) - CAD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity, Not Primary Beneficiary
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	$ 1,896	$ 3,947
Maximum Exposure to Loss	6,148	8,949
Aux Sable Liquid Products L.P.
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	267	311
Maximum Exposure to Loss	331	375
Eolien Maritime France SAS
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	67	68
Maximum Exposure to Loss	725	784
Affiliate loan receivable	166	202
Enbridge Renewable Infrastructure Investments S.a.r.l. (ERII)
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	141	127
Maximum Exposure to Loss	2,720	3,037
Affiliate loan receivable	766	461
Gray Oak Holdings LLC
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	463
Maximum Exposure to Loss	935
Illinois Extension Pipeline Company, L.L.C.
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		724
Maximum Exposure to Loss		724
Nexus Gas Transmission, LLC
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		1,757
Maximum Exposure to Loss		2,668
PennEast Pipeline Company, LLC
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	106	97
Maximum Exposure to Loss	368	385
Rampion Offshore Wind Limited
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	600	638
Maximum Exposure to Loss	620	648
Vector Pipeline L.P.
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	195	198
Maximum Exposure to Loss	392	301
Affiliate loan receivable	92	102
Credit facility provided	105
Other
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	57	27
Maximum Exposure to Loss	$ 57	$ 27

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due after 1 year (or 1 business cycle).

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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Net carrying amount of the assets and liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), when the reporting entity is not the VIE's primary beneficiary.

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