LONG-TERM INVESTMENTS - Schedule of Long-Term Investments (Details) $ in Millions	Dec. 31, 2022 CAD ($) project	Nov. 30, 2022	Aug. 17, 2022	Aug. 16, 2022	Dec. 31, 2021 CAD ($)	Oct. 12, 2021	Mar. 18, 2021 project
LONG-TERM INVESTMENTS
Total long-term investments	$ 15,936				$ 13,324
DCP Midstream, LLC
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	90.00%			50.00%
DCP Midstream, LP
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	13.20%				28.30%
Woodfibre LNG Limited Partnership
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)		30.00%
EIH S.a.r.l.
LONG-TERM INVESTMENTS
Number of offshore wind projects | project	3
Gray Oak Pipeline, LLC
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	65.00%				65.00%
Éolien Maritime France SAS
LONG-TERM INVESTMENTS
Number of offshore wind projects | project							3
EMF
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)							25.50%
Gray Oak Holdings LLC
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)			58.50%	22.80%	35.00%
MaRen Bakken Company LLC | MaRen Bakken Company LLC | Liquids Pipelines
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	75.00%
EQUITY INVESTMENTS	$ 1,968				$ 1,752
MaRen Bakken Company LLC | Bakken Pipeline Investments, LLC
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	49.00%
MaRen Bakken Company LLC | Bakken Pipeline System
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	27.60%
DCP Midstream, LLC | DCP Midstream, LLC
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	23.40%
DCP Midstream, LLC | DCP Midstream, LLC | Liquids Pipelines
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	90.00%
EQUITY INVESTMENTS	$ 1,394				469
DCP Midstream, LLC | DCP Midstream, LLC | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	23.40%
EQUITY INVESTMENTS	$ 317				397
DCP Midstream, LLC | DCP Midstream, LP
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	56.50%
Seaway | Seaway | Liquids Pipelines
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
EQUITY INVESTMENTS	$ 2,744				2,634
Illinois Extension Pipeline Company, LLC | Illinois Extension Pipeline Company, LLC | Liquids Pipelines
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	65.00%
EQUITY INVESTMENTS	$ 622				593
Cactus II Pipeline, LLC | Cactus II Pipeline, LLC | Liquids Pipelines
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	30.00%					20.00%
EQUITY INVESTMENTS	$ 658				434
Other | Other | Liquids Pipelines
LONG-TERM INVESTMENTS
EQUITY INVESTMENTS	76				71
Other | Other | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
EQUITY INVESTMENTS	0				14
Other | Other | Gas Distribution and Storage
LONG-TERM INVESTMENTS
EQUITY INVESTMENTS	20				20
Other | Other | Renewable Power Generation
LONG-TERM INVESTMENTS
EQUITY INVESTMENTS	$ 107				92
Other | Other | Minimum | Liquids Pipelines
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	30.00%
Other | Other | Minimum | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	20.00%
Other | Other | Minimum | Gas Distribution and Storage
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	47.60%
Other | Other | Minimum | Renewable Power Generation
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	12.00%
Other | Other | Minimum | Eliminations and Other
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	42.70%
Other | Other | Maximum | Liquids Pipelines
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	43.80%
Other | Other | Maximum | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	33.30%
Other | Other | Maximum | Gas Distribution and Storage
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
Other | Other | Maximum | Renewable Power Generation
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
Other | Other | Maximum | Eliminations and Other
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
Alliance Pipeline | Alliance Pipeline | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
EQUITY INVESTMENTS	$ 430				504
Aux Sable | Aux Sable | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
EQUITY INVESTMENTS	$ 214				238
Aux Sable | Aux Sable | Minimum | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	42.70%
Aux Sable | Aux Sable | Maximum | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
Gulfstream Natural Gas System, L.L.C. | Gulfstream Natural Gas System, L.L.C. | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
EQUITY INVESTMENTS	$ 1,274				1,180
Nexus Gas Transmission, LLC | Nexus Gas Transmission, LLC | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
EQUITY INVESTMENTS	$ 1,813				1,724
Sabal Trail Transmission, LLC | Sabal Trail Transmission, LLC | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
EQUITY INVESTMENTS	$ 1,535				1,464
Southeast Supply Header, LLC | Southeast Supply Header, LLC | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
EQUITY INVESTMENTS	$ 86				82
Steckman Ridge, LP | Steckman Ridge, LP | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	50.00%
EQUITY INVESTMENTS	$ 91				88
Vector Pipeline Limited | Vector Pipeline Limited | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	60.00%
EQUITY INVESTMENTS	$ 195				189
Woodfibre LNG Limited Partnership | Woodfibre LNG Limited Partnership | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	30.00%
EQUITY INVESTMENTS	$ 635				0
Offshore - various joint ventures | Offshore - various joint ventures | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
EQUITY INVESTMENTS	$ 314				309
Offshore - various joint ventures | Offshore - various joint ventures | Minimum | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	22.00%
Offshore - various joint ventures | Offshore - various joint ventures | Maximum | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	74.30%
EIH S.a.r.l. | EIH S.a.r.l.
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)							49.00%
EIH S.a.r.l. | EIH S.a.r.l. | Renewable Power Generation
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	51.00%
EQUITY INVESTMENTS	$ 37				38
Enbridge Renewable Infrastructure Investments S.à.r.l. | Enbridge Renewable Infrastructure Investments S.à.r.l. | Renewable Power Generation
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	51.00%
EQUITY INVESTMENTS	$ 163				54
Rampion Offshore Wind Limited | Rampion Offshore Wind Limited | Renewable Power Generation
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	24.90%
EQUITY INVESTMENTS	$ 413				450
NextBridge Infrastructure LP | NextBridge Infrastructure LP | Renewable Power Generation
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	25.00%
EQUITY INVESTMENTS	$ 241				186
Fairwood Peninsula Energy Corporation | Gas Transmission and Midstream
LONG-TERM INVESTMENTS
OTHER LONG-TERM INVESTMENTS	22				20
Emerging Technologies and Other | Renewable Power Generation
LONG-TERM INVESTMENTS
OTHER LONG-TERM INVESTMENTS	31				32
Other long-term investments | Eliminations and Other
LONG-TERM INVESTMENTS
OTHER LONG-TERM INVESTMENTS	$ 488				$ 290
Bakken Pipeline Investments, LLC | Bakken Pipeline System
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	75.00%
Gray Oak Pipeline, LLC | Gray Oak Pipeline, LLC
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)	58.50%
Gray Oak Pipeline, LLC | Gray Oak Holdings LLC
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)					22.80%
Éolien Maritime France SAS | Éolien Maritime France SAS
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)							50.00%
Saint-Nazaire | Saint-Nazaire
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)							25.50%
Fécamp | Fécamp
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)							17.90%
Calvados | Calvados
LONG-TERM INVESTMENTS
Ownership Interest (as a percent)							21.70%