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VARIABLE INTEREST ENTITIES - Schedule of the Carrying Amount of Interest in VIEs (Details) $ in Millions | Dec. 31, 2023 CAD ($) | Nov. 15, 2023 | Dec. 31, 2022 CAD ($) project
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Fox Squirrel Solar LLC |  |  |
VARIABLE INTEREST ENTITY |  |  |
Ownership interest (as a percent) |  | 50.00% |
Variable Interest Entity, Not Primary Beneficiary |  |  |
VARIABLE INTEREST ENTITY |  |  |
Carrying amount of investment in VIE | $ 1,909 |  | $ 1,616
Maximum exposure to loss | 4,647 |  | 4,466
Variable Interest Entity, Not Primary Beneficiary | Aux Sable Liquid Products L.P. |  |  |
VARIABLE INTEREST ENTITY |  |  |
Carrying amount of investment in VIE | 105 |  | 91
Maximum exposure to loss | 130 |  | 117
Variable Interest Entity, Not Primary Beneficiary | EIH S.a.r.l. |  |  |
VARIABLE INTEREST ENTITY |  |  |
Carrying amount of investment in VIE |  |  | 37
Maximum exposure to loss |  |  | $ 637
Number of offshore wind projects | project |  |  | 3
Variable Interest Entity, Not Primary Beneficiary | EIH S.a.r.l. | Affiliated Entity |  |  |
VARIABLE INTEREST ENTITY |  |  |
Affiliate loan receivable |  |  | $ 56
Variable Interest Entity, Not Primary Beneficiary | Rampion Offshore Wind Limited |  |  |
VARIABLE INTEREST ENTITY |  |  |
Carrying amount of investment in VIE | 391 |  | 413
Maximum exposure to loss | 452 |  | 468
Variable Interest Entity, Not Primary Beneficiary | Vector Pipeline L.P. |  |  |
VARIABLE INTEREST ENTITY |  |  |
Carrying amount of investment in VIE | 191 |  | 195
Maximum exposure to loss | 320 |  | 325
Credit facility provided | 105 |  | 105
Variable Interest Entity, Not Primary Beneficiary | Vector Pipeline L.P. | Affiliated Entity |  |  |
VARIABLE INTEREST ENTITY |  |  |
Affiliate loan receivable | 24 |  | 25
Variable Interest Entity, Not Primary Beneficiary | Woodfibre LNG LP |  |  |
VARIABLE INTEREST ENTITY |  |  |
Carrying amount of investment in VIE | 778 |  | 635
Maximum exposure to loss | 2,854 |  | 2,476
Variable Interest Entity, Not Primary Beneficiary | Fox Squirrel Solar LLC |  |  |
VARIABLE INTEREST ENTITY |  |  |
Carrying amount of investment in VIE | 312 |  |
Maximum exposure to loss | 661 |  |
Variable Interest Entity, Not Primary Beneficiary | Other |  |  |
VARIABLE INTEREST ENTITY |  |  |
Carrying amount of investment in VIE | 132 |  | 245
Maximum exposure to loss | $ 230 |  | $ 443

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