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Property, plant and equipment (Regulated and Non-regulated Assets) (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment, Net
Total cost	$ 30,576	$ 26,868
Less: Accumulated depreciation	(9,574)	(8,739)
Total cost less: Accumulated depreciation	21,002	18,129
Construction work in progress	1,994	2,224
Property, Plant and Equipment, Net	22,996	20,353
Generation
Property, Plant and Equipment, Net
Total cost	$ 13,083	11,173
Generation | Range, Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	2 years
Generation | Range, Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	131 years
Transmission
Property, Plant and Equipment, Net
Total cost	$ 2,731	2,532
Transmission | Range, Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Transmission | Range, Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	80 years
Distribution
Property, Plant and Equipment, Net
Total cost	$ 6,978	6,305
Distribution | Range, Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Distribution | Range, Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	65 years
Gas transmission and distribution
Property, Plant and Equipment, Net
Total cost	$ 5,061	4,385
Gas transmission and distribution | Range, Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	13 years
Gas transmission and distribution | Range, Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	83 years
General plant and other
Property, Plant and Equipment, Net
Total cost	$ 2,723	$ 2,473
General plant and other | Range, Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	2 years
General plant and other | Range, Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	71 years

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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