Balance Sheet Components Balance Sheet Components Public Utility Property, Plant, and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	$ 4,649	$ 4,436
Public Utilities, Property, Plant and Equipment, Transmission	1,012	970
Public Utilities, Property, Plant and Equipment, Distribution	4,469	4,136
Public Utilities, Property, Plant and Equipment, General	914	679
Public Utilities, Property, Plant and Equipment, Intangible	794	753
Public Utilities, Property, Plant and Equipment, Plant in Service	11,838	10,974
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	4,146	3,864
In service, net	7,692	7,110
Construction work-in-progress	313	429
Public Utilities, Property, Plant and Equipment, Net	$ 8,005	$ 7,539