VARIABLE INTEREST ENTITIES - Schedule of the Carrying Amount of Interest in VIEs (Details) - CAD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
VARIABLE INTEREST ENTITY
Affiliate loan receivable	$ 1,108	$ 1,023
Variable Interest Entity, Not Primary Beneficiary
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	1,351	1,752
Maximum Exposure to Loss	5,424	5,965
Variable Interest Entity, Not Primary Beneficiary \| Aux Sable Liquid Products L.P.
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	106	123
Maximum Exposure to Loss	187	148
Variable Interest Entity, Not Primary Beneficiary \| Eolien Maritime France SAS
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	96	67
Maximum Exposure to Loss	949	725
Affiliate loan receivable	132	166
Variable Interest Entity, Not Primary Beneficiary \| Enbridge Renewable Infrastructure Investments S.a.r.l. (ERII)
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	100	141
Maximum Exposure to Loss	2,516	2,720
Affiliate loan receivable	904	766
Variable Interest Entity, Not Primary Beneficiary \| Enbridge Eolien France 2 S.a.r.l
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	2
Maximum Exposure to Loss	230
Variable Interest Entity, Not Primary Beneficiary \| Gray Oak Holdings LLC
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE		463
Maximum Exposure to Loss		935
Variable Interest Entity, Not Primary Beneficiary \| PennEast Pipeline Company, LLC
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	116	106
Maximum Exposure to Loss	371	368
Variable Interest Entity, Not Primary Beneficiary \| Rampion Offshore Wind Limited
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	599	600
Maximum Exposure to Loss	650	620
Variable Interest Entity, Not Primary Beneficiary \| Vector Pipeline L.P.
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	201	195
Maximum Exposure to Loss	390	392
Affiliate loan receivable	84	92
Credit facility provided	105
Variable Interest Entity, Not Primary Beneficiary \| Other
VARIABLE INTEREST ENTITY
Carrying Amount of Investment in VIE	131	57
Maximum Exposure to Loss	$ 131	$ 57

Amount of net assets (liabilities).

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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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