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Property, Plant and Equipment (Details 6)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Average generation segment rates | General Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 6.06% 6.24% 6.25%
Average generation segment rates | Machinery [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 3.29% 3.87% 3.68%
Average generation segment rates | Generators [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 3.40% 3.42% 3.42%
Average generation segment rates | Reservoirs Dams And Aqueducts [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 2.26% 2.64% 2.67%
Average generation segment rates | Hydraulic Turbines [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 2.77% 2.88% 2.89%
Average generation segment rates | Wind Power Plant Unit [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 4.85% 4.94% 4.94%
Average generation segment rates | Buildings [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 2.79% 3.05% 3.07%
Average rates for central government assets | Buildings [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 3.34% 3.33% 3.33%
Average rates for central government assets | Office equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 12.07% 6.25% 6.25%
Average rates for central government assets | Fixtures and fittings [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 6.26% 6.27% 6.25%
Average rates for central government assets | Vehicle [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Average rate of depreciation 14.29% 14.29% 14.29%