ACQUISITIONS AND DISPOSITIONS - Noncontrolling Interest Investment and Disposition (Narrative) (Details) $ in Millions		3 Months Ended		6 Months Ended
	Jul. 02, 2025 CAD ($) Community	Jun. 30, 2025 CAD ($)	Jun. 30, 2024 CAD ($)	Jun. 30, 2025 CAD ($)	Jun. 30, 2024 CAD ($)	Dec. 31, 2024 CAD ($)	Apr. 01, 2024 CAD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale		$ 0	$ 1,091	$ 0	$ 1,091
Goodwill		$ 35,162		$ 35,162		$ 36,600
Disposal Group, Alliance Pipeline And Aux Sable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale			$ 1,100		$ 1,100
Disposal Group, Alliance Pipeline And Aux Sable | Gas Transmission
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill							$ 1,000
Disposal Group, Alliance Pipeline And Aux Sable | Pembina Pipeline Corporation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration							3,100
Non-recourse debt							$ 327
British Columbia Pipeline | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of communities represented | Community	38
British Columbia Pipeline | Westcoast Energy Inc. | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncontrolling interest (percent)	87.50%
British Columbia Pipeline | Westcoast Energy Inc. | Disposition | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment by noncontrolling interest	$ 736
Cash consideration	$ 736
British Columbia Pipeline | Stonlasec8 Indigenous Alliance Limited Partnership | Disposition | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest percentage held by noncontrolling owners	12.50%
Alliance Pipeline | Disposal Group, Alliance Pipeline And Aux Sable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest (as percent)							50.00%
Aux Sable Midstream LLC and Aux Sable Liquid Products L.P. | Disposal Group, Alliance Pipeline And Aux Sable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest (as percent)							42.70%
Aux Sable Canada LP [Member] | Disposal Group, Alliance Pipeline And Aux Sable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest (as percent)							50.00%