SEGMENTED INFORMATION (Details) $ in Millions, $ in Millions			3 Months Ended		9 Months Ended
	Aug. 17, 2022 CAD ($)	Aug. 17, 2022 USD ($)	Sep. 30, 2022 CAD ($)	Sep. 30, 2021 CAD ($)	Sep. 30, 2022 CAD ($)	Sep. 30, 2021 CAD ($)
Segmented Information
Operating revenues			$ 11,573	$ 11,466	$ 39,885	$ 34,551
Commodity and gas distribution costs			(6,630)	(7,467)	(25,014)	(21,334)
Operating and administrative			(2,089)	(1,667)	(5,958)	(4,710)
Income/(loss) from equity investments			536	440	1,537	1,187
Impairment of equity investments			0	(111)	0	(111)
Gain on joint venture merger transaction	$ 1,100	$ 832	1,076	0	1,076	0
Other income/(expense)			(883)	(56)	(924)	446
Earnings/(loss) before interest, income taxes and depreciation and amortization			3,583	2,605	10,602	10,029
Depreciation and amortization			(1,076)	(944)	(3,195)	(2,805)
Interest expense			(806)	(648)	(2,316)	(1,923)
Income tax expense			(318)	(199)	(1,044)	(952)
Earnings			1,383	814	4,047	4,349
Capital expenditures			1,215	2,185	3,236	5,944
Eliminations and Other
Segmented Information
Operating revenues			(140)	(162)	(457)	(468)
Commodity and gas distribution costs			140	159	454	479
Operating and administrative			7	41	(158)	(35)
Income/(loss) from equity investments			0	0	(2)	0
Impairment of equity investments				0
Gain on joint venture merger transaction			0		0
Other income/(expense)			(942)	(159)	(1,121)	215
Earnings/(loss) before interest, income taxes and depreciation and amortization			(935)	(121)	(1,284)	191
Capital expenditures			8	20	32	42
Liquids Pipelines | Business segments
Segmented Information
Operating revenues			2,899	2,370	8,592	7,616
Commodity and gas distribution costs			27	(6)	0	(16)
Operating and administrative			(1,173)	(919)	(3,096)	(2,411)
Income/(loss) from equity investments			193	226	561	560
Impairment of equity investments				0		0
Gain on joint venture merger transaction			0		0
Other income/(expense)			0	2	36	7
Earnings/(loss) before interest, income taxes and depreciation and amortization			1,946	1,673	6,093	5,756
Capital expenditures			268	1,203	1,086	3,385
Gas Transmission and Midstream | Business segments
Segmented Information
Operating revenues			1,366	1,159	3,967	3,501
Commodity and gas distribution costs			0	0	0	0
Operating and administrative			(545)	(445)	(1,620)	(1,303)
Income/(loss) from equity investments			321	211	877	525
Impairment of equity investments				(111)		(111)
Gain on joint venture merger transaction			1,076		1,076
Other income/(expense)			33	70	84	113
Earnings/(loss) before interest, income taxes and depreciation and amortization			2,251	884	4,384	2,725
Capital expenditures			525	602	1,087	1,631
Gas Distribution and Storage | Business segments
Segmented Information
Operating revenues			909	687	4,458	3,463
Commodity and gas distribution costs			(327)	(135)	(2,258)	(1,392)
Operating and administrative			(311)	(280)	(891)	(794)
Income/(loss) from equity investments			0	(12)	1	37
Impairment of equity investments				0
Gain on joint venture merger transaction			0		0
Other income/(expense)			15	22	58	60
Earnings/(loss) before interest, income taxes and depreciation and amortization			286	282	1,368	1,374
Capital expenditures			405	359	1,005	878
Renewable Power Generation | Business segments
Segmented Information
Operating revenues			120	122	431	371
Commodity and gas distribution costs			(5)	0	(13)	0
Operating and administrative			(58)	(51)	(159)	(131)
Income/(loss) from equity investments			22	15	100	65
Impairment of equity investments				0
Gain on joint venture merger transaction			0		0
Other income/(expense)			26	5	30	57
Earnings/(loss) before interest, income taxes and depreciation and amortization			105	91	389	362
Capital expenditures			9	0	26	7
Energy Services | Business segments
Segmented Information
Operating revenues			6,419	7,290	22,894	20,068
Commodity and gas distribution costs			(6,465)	(7,485)	(23,197)	(20,405)
Operating and administrative			(9)	(13)	(34)	(36)
Income/(loss) from equity investments			0	0	0	0
Impairment of equity investments						0
Gain on joint venture merger transaction			0		0
Other income/(expense)			(15)	4	(11)	(6)
Earnings/(loss) before interest, income taxes and depreciation and amortization			(70)	(204)	(348)	(379)
Capital expenditures			0	1	0	1
Energy Services | Business segments
Segmented Information
Operating revenues			$ 6,419	7,290	$ 22,894	$ 20,068
Impairment of equity investments				$ 0