SEGMENTED INFORMATION (Details) - CAD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segmented Information
Operating revenues	$ 10,432	$ 13,215	$ 22,507	$ 28,312
Commodity and gas distribution costs	(4,917)	(8,637)	(11,147)	(18,384)
Operating and administrative	(2,028)	(1,994)	(4,065)	(3,869)
Income/(loss) from equity investments	478	510	995	1,001
Other income/(expense)	575	(499)	677	(41)
Earnings/(loss) before interest, income taxes and depreciation and amortization	4,540	2,595	8,967	7,019
Depreciation and amortization	(1,137)	(1,064)	(2,283)	(2,119)
Interest expense	(883)	(791)	(1,788)	(1,510)
Income tax expense	(519)	(133)	(1,029)	(726)
Earnings	2,001	607	3,867	2,664
Capital expenditures	976	963	2,117	2,021
Eliminations and Other
Segmented Information
Operating revenues	(127)	(155)	(278)	(317)
Commodity and gas distribution costs	104	151	272	314
Operating and administrative	42	(128)	57	(165)
Income/(loss) from equity investments	(3)	(2)	(7)	(2)
Other income/(expense)	513	(570)	491	(179)
Earnings/(loss) before interest, income taxes and depreciation and amortization	529	(704)	535	(349)
Capital expenditures	27	12	52	24
Liquids Pipelines | Business segments
Segmented Information
Operating revenues	3,270	2,638	6,435	5,693
Commodity and gas distribution costs	0	(16)	0	(27)
Operating and administrative	(1,083)	(976)	(2,206)	(1,923)
Income/(loss) from equity investments	254	153	502	368
Other income/(expense)	10	19	83	36
Earnings/(loss) before interest, income taxes and depreciation and amortization	2,451	1,818	4,814	4,147
Capital expenditures	237	273	517	818
Gas Transmission and Midstream | Business segments
Segmented Information
Operating revenues	1,410	1,301	2,901	2,601
Commodity and gas distribution costs	0	0	0	0
Operating and administrative	(588)	(545)	(1,137)	(1,075)
Income/(loss) from equity investments	199	335	437	556
Other income/(expense)	21	28	46	51
Earnings/(loss) before interest, income taxes and depreciation and amortization	1,042	1,119	2,247	2,133
Capital expenditures	343	333	870	562
Gas Distribution and Storage | Business segments
Segmented Information
Operating revenues	1,050	1,138	3,675	3,549
Commodity and gas distribution costs	(371)	(463)	(1,983)	(1,931)
Operating and administrative	(325)	(281)	(634)	(580)
Income/(loss) from equity investments	1	1	1	1
Other income/(expense)	12	22	24	43
Earnings/(loss) before interest, income taxes and depreciation and amortization	367	417	1,083	1,082
Capital expenditures	346	334	610	600
Renewable Power Generation | Business segments
Segmented Information
Operating revenues	150	155	294	311
Commodity and gas distribution costs	(2)	(4)	(6)	(8)
Operating and administrative	(62)	(53)	(115)	(101)
Income/(loss) from equity investments	27	23	62	78
Other income/(expense)	16	1	30	4
Earnings/(loss) before interest, income taxes and depreciation and amortization	129	122	265	284
Capital expenditures	23	11	68	17
Energy Services | Business segments
Segmented Information
Operating revenues	4,679	8,138	9,480	16,475
Commodity and gas distribution costs	(4,648)	(8,305)	(9,430)	(16,732)
Operating and administrative	(12)	(11)	(30)	(25)
Income/(loss) from equity investments	0	0	0	0
Other income/(expense)	3	1	3	4
Earnings/(loss) before interest, income taxes and depreciation and amortization	22	(177)	23	(278)
Capital expenditures	$ 0	$ 0	$ 0	$ 0