Property Plant and Equipment Property Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	$ 5,365	$ 4,877
Accumulated Depreciation	1,695	1,640
Property, Plant and Equipment, Net	3,670	3,237
Electric plant
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	4,103	3,845
Natural gas plant
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	547	502
Common and other property
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	309	278
CWIP
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	$ 406	$ 252