Material Accounting Policies (schedule of useful lives for property, plant and equipment) (Details)	12 Months Ended
	Dec. 31, 2023
Roads, buildings and land [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (Years)	23 – 30	[1]
Power plants [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (Years)	23 – 40
Maintenance work [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (Years)	1.5 – 15 years
Back up diesel fuel [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives (Years)	by consumption

[1] Freehold land is not depreciated.