Commitments And Contingencies (Nuclear Fuel Storage) (Details) (Pacific Gas And Electric Company [Member], USD $) In Millions, unless otherwise specified	72 Months Ended
	Dec. 31, 2010	Aug. 03, 2011	Mar. 30, 2011	Dec. 31, 2004
Pacific Gas And Electric Company [Member]
Costs incurred that the Utility sought recovery for				$ 92
Amount of costs awarded by U.S. Court of Federal Claims			89
Number of complaints filed		2
Costs incurred to build on-site spent nuclear fuel storage facilities	$ 205