GOODWILL (Details) - CAD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 31,848	$ 32,440
Foreign exchange and other	2,264	(638)
Dispositions	(1,026)
Acquisition	3,514	46
Goodwill, ending balance	36,600	31,848
Goodwill, gross at end of period	40,700	35,900
Goodwill accumulated impairment	4,100	4,100
Goodwill, written off related to sale of business unit	1,026
Aitken Creek Gas Storage Facility
Goodwill [Roll Forward]
Acquisition		46
Public Service Company of North Carolina, Incorporated
Goodwill [Roll Forward]
Acquisition	895
Questar Gas Company
Goodwill [Roll Forward]
Acquisition	793
The East Ohio Gas Company
Goodwill [Roll Forward]
Acquisition	1,600
RNG Facilities
Goodwill [Roll Forward]
Acquisition	223
Disposal Group, Alliance Pipeline And Aux Sable
Goodwill [Roll Forward]
Dispositions	(1,000)
Goodwill, written off related to sale of business unit	1,000
Liquids Pipelines
Goodwill [Roll Forward]
Goodwill, beginning balance	8,344	8,549
Foreign exchange and other	672	(205)
Dispositions	0
Acquisition	0	0
Goodwill, ending balance	9,016	8,344
Goodwill, written off related to sale of business unit	0
Gas Transmission
Goodwill [Roll Forward]
Goodwill, beginning balance	17,727	18,106
Foreign exchange and other	1,354	(425)
Dispositions	(1,026)
Acquisition	223	46
Goodwill, ending balance	18,278	17,727
Goodwill, written off related to sale of business unit	1,026
Gas Distribution and Storage
Goodwill [Roll Forward]
Goodwill, beginning balance	5,397	5,397
Foreign exchange and other	204	0
Dispositions	0
Acquisition	3,291	0
Goodwill, ending balance	8,892	5,397
Goodwill, written off related to sale of business unit	0
Renewable Power Generation
Goodwill [Roll Forward]
Goodwill, beginning balance	380	388
Foreign exchange and other	34	(8)
Dispositions	0
Acquisition	0	0
Goodwill, ending balance	414	$ 380
Goodwill, written off related to sale of business unit	$ 0

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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