SEGMENTED INFORMATION (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segmented Information
Operating revenues	$ 14,882	$ 9,844	$ 37,256	$ 32,351
Commodity and gas distribution costs	(9,066)	(4,831)	(19,548)	(15,978)
Operating and administrative	(2,281)	(2,055)	(6,723)	(6,120)
Income/(loss) from equity investments	479	343	1,664	1,338
Gain on disposition of equity investments (Note 6)	0	0	1,091	0
Other income / (expense)	376	(465)	(206)	212
Earnings/(loss) before interest, income taxes and depreciation and amortization	4,390	2,836	13,534	11,803
Depreciation and amortization	(1,317)	(1,164)	(3,783)	(3,447)
Interest expense	(1,314)	(921)	(3,301)	(2,709)
Income tax expense	(312)	(128)	(1,437)	(1,157)
Earnings	1,447	623	5,013	4,490
Capital expenditures	1,652	1,206	4,216	3,323
Energy Marketing Subsidiaries | Subsidiaries
Segmented Information
Operating revenues	213	279	750	1,100
Commodity and gas distribution costs	(213)	(292)	(757)	(1,000)
Business segments | Liquids Pipelines
Segmented Information
Operating revenues	11,775	7,355	26,815	22,200
Commodity and gas distribution costs	(8,624)	(4,344)	(17,168)	(12,771)
Operating and administrative	(1,104)	(1,093)	(3,311)	(3,320)
Income/(loss) from equity investments	261	232	798	733
Gain on disposition of equity investments (Note 6)			0
Other income / (expense)	17	14	45	102
Earnings/(loss) before interest, income taxes and depreciation and amortization	2,325	2,164	7,179	6,944
Capital expenditures	268	318	766	835
Business segments | Gas Transmission
Segmented Information
Operating revenues	1,486	1,423	4,550	4,324
Commodity and gas distribution costs	(29)	1	(117)	1
Operating and administrative	(536)	(578)	(1,701)	(1,715)
Income/(loss) from equity investments	182	94	611	531
Gain on disposition of equity investments (Note 6)			1,063
Other income / (expense)	43	33	100	79
Earnings/(loss) before interest, income taxes and depreciation and amortization	1,146	973	4,506	3,220
Capital expenditures	609	462	1,770	1,332
Business segments | Gas Distribution and Storage
Segmented Information
Operating revenues	1,281	751	4,796	4,426
Commodity and gas distribution costs	(203)	(190)	(1,519)	(2,173)
Operating and administrative	(579)	(305)	(1,486)	(939)
Income/(loss) from equity investments	0	0	1	1
Gain on disposition of equity investments (Note 6)			0
Other income / (expense)	23	15	62	39
Earnings/(loss) before interest, income taxes and depreciation and amortization	522	271	1,854	1,354
Capital expenditures	675	415	1,412	1,025
Business segments | Renewable Power Generation
Segmented Information
Operating revenues	133	40	370	334
Commodity and gas distribution costs	2	(13)	1	(19)
Operating and administrative	(74)	(63)	(214)	(178)
Income/(loss) from equity investments	39	21	265	83
Gain on disposition of equity investments (Note 6)			28
Other income / (expense)	2	45	47	75
Earnings/(loss) before interest, income taxes and depreciation and amortization	102	30	497	295
Capital expenditures	92	9	209	77
Eliminations and Other
Segmented Information
Operating revenues	207	275	725	1,067
Commodity and gas distribution costs	(212)	(285)	(745)	(1,016)
Operating and administrative	12	(16)	(11)	32
Income/(loss) from equity investments	(3)	(4)	(11)	(10)
Gain on disposition of equity investments (Note 6)			0
Other income / (expense)	291	(572)	(460)	(83)
Earnings/(loss) before interest, income taxes and depreciation and amortization	295	(602)	(502)	(10)
Capital expenditures	$ 8	$ 2	$ 59	$ 54