SEGMENTED INFORMATION (Details) - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segmented Information
Operating revenues	$ 12,075	$ 15,097
Commodity and gas distribution costs	(6,230)	(9,747)
Operating and administrative	(2,037)	(1,875)
Income/(loss) from equity investments	517	491
Other income/(expense)	102	458
Earnings/(loss) before interest, income taxes and depreciation and amortization	4,427	4,424
Depreciation and amortization	(1,146)	(1,055)
Interest expense	(905)	(719)
Income tax expense	(510)	(593)
Earnings	1,866	2,057
Capital expenditures	1,141	1,058
Eliminations and Other
Segmented Information
Operating revenues	(151)	(162)
Commodity and gas distribution costs	168	163
Operating and administrative	15	(37)
Income/(loss) from equity investments	(4)	0
Other income/(expense)	(22)	391
Earnings/(loss) before interest, income taxes and depreciation and amortization	6	355
Capital expenditures	25	12
Liquids Pipelines | Business segments
Segmented Information
Operating revenues	3,165	3,055
Commodity and gas distribution costs	0	(11)
Operating and administrative	(1,123)	(947)
Income/(loss) from equity investments	248	215
Other income/(expense)	73	17
Earnings/(loss) before interest, income taxes and depreciation and amortization	2,363	2,329
Capital expenditures	280	545
Gas Transmission and Midstream | Business segments
Segmented Information
Operating revenues	1,491	1,300
Commodity and gas distribution costs	0	0
Operating and administrative	(549)	(530)
Income/(loss) from equity investments	238	221
Other income/(expense)	25	23
Earnings/(loss) before interest, income taxes and depreciation and amortization	1,205	1,014
Capital expenditures	527	229
Gas Distribution and Storage | Business segments
Segmented Information
Operating revenues	2,625	2,411
Commodity and gas distribution costs	(1,612)	(1,468)
Operating and administrative	(309)	(299)
Income/(loss) from equity investments	0	0
Other income/(expense)	12	21
Earnings/(loss) before interest, income taxes and depreciation and amortization	716	665
Capital expenditures	264	266
Renewable Power Generation | Business segments
Segmented Information
Operating revenues	144	156
Commodity and gas distribution costs	(4)	(4)
Operating and administrative	(53)	(48)
Income/(loss) from equity investments	35	55
Other income/(expense)	14	3
Earnings/(loss) before interest, income taxes and depreciation and amortization	136	162
Capital expenditures	45	6
Energy Services | Business segments
Segmented Information
Operating revenues	4,801	8,337
Commodity and gas distribution costs	(4,782)	(8,427)
Operating and administrative	(18)	(14)
Income/(loss) from equity investments	0	0
Other income/(expense)	0	3
Earnings/(loss) before interest, income taxes and depreciation and amortization	1	(101)
Capital expenditures	$ 0	$ 0