Organization And Basis of Presentation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Organization And Basis Of Presentation [Line Items]
Total Penalties Issued by CPUC	$ 553
Fine payable to the state	100			200
Bill Credit to Natural Gas Customers	400
Public Utilities Property Plant And Equipment Amount Of Indirect Disallowance Of Costs Of Recently Completed Plants	53.0		0
Total Penalty Decision [Member]
Organization And Basis Of Presentation [Line Items]
Total Penalties Issued by CPUC	1,600
Fine payable to the state	300	[1]
Bill Credit to Natural Gas Customers	400
Public Utilities Property Plant And Equipment Amount Of Indirect Disallowance Of Costs Of Recently Completed Plants	688.5
Pacific Gas And Electric Company [Member]
Organization And Basis Of Presentation [Line Items]
Public Utilities Property Plant And Equipment Amount Of Indirect Disallowance Of Costs Of Recently Completed Plants	$ 53.0		$ 0

[1] The Utility increased its accrual from $200 million at December 31, 2014 to $300 million at March 31, 2015.