Property, Plant, and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	$ 39,539	$ 36,548
Less: accumulated depreciation	17,423	16,726
Property, plant, and equipment, net	22,116	19,822
Nuclear fuel - work in progress	1,265	937
Electric
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	$ 32,889	30,804
Electric | Minimum
Property, Plant and Equipment [Line Items]
Average Service Life (years)	1 year
Electric | Maximum
Property, Plant and Equipment [Line Items]
Average Service Life (years)	60 years
Nuclear fuel
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	$ 5,503	5,106
Less: accumulated depreciation	$ 2,484	2,657
Nuclear fuel | Minimum
Property, Plant and Equipment [Line Items]
Average Service Life (years)	1 year
Nuclear fuel | Maximum
Property, Plant and Equipment [Line Items]
Average Service Life (years)	8 years
Construction work in progress
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	$ 1,133	630
Other property, plant, and equipment
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment	$ 14	$ 8
Other property, plant, and equipment | Minimum
Property, Plant and Equipment [Line Items]
Average Service Life (years)	1 year
Other property, plant, and equipment | Maximum
Property, Plant and Equipment [Line Items]
Average Service Life (years)	10 years